The Maths Prof: Solve Simultaneous Equations part 2 (by elimination)

[@chefernandez563]

Im a digital marketing student from Cape Town and for some reason they decided to torture me with math i haven't done since grade 9 hahaha thank u so much this saved me from a mental break

[@zunairafzal72]

I have always hated maths, but because of you, I get to understand it. Thanks, Prof.

[@tharshana9274]

I’ve literally got my maths Synoptics (mocks) today and the only one I didn’t know on the topic list was simultaneous equations thank you so much this is the only videos that have helped!

[@TheMathsProf]

Hope it went well! 😁👍

[@tharshana9274]

@@TheMathsProf yess I got the highest thank you so much!

[@timesalim8598]

@@TheMathsProf mm

[@lastbornrelic3430]

@@timesalim8598 🤣

[@lastbornrelic3430]

@@tharshana9274 jealous much lmao

[@ableykelvin3026]

I really love the way you teach 💕💕💯👏

[@GILBERTTAKURANGEYI]

You are the best Math teacher,yu just make things look easier

[@jaycengavin5097]

Good teaching really good explaining

[@NusheerahAbdoolcareem]

Hello maths prof how do you calculate the last one for x in your calculator show me how because I don't get it😢

[@confidencebreezy3997]

Am not understanding maths but I think with your teaching am now able to understand it now, thank you so much

[@daniella7533]

Thanks a lot this video helped me with my revision but please take a look on -2-(-15) it's supposed to be 13 not 17 I think

[@grassytramtracks]

It's -2-(+15), not -2--15 so the 2 minuses make a plus rule doesn't apply

[@Blessing-q4w]

THE MATHS PROF YOU ARE THE BEST

[@ÃñgëlõPhëñømëñãl]

You're really marvellous in making me understand the simultaneous equations ❤

[@raptalk5711]

4.09 what happens if you get different values for b and c but if you substitute both of the values you get into the equation you still get the right answer 18. Will it be marked correct in the exam?

[@riorogers6502]

Thank you Prof, this video was helpful.

[@anoemigere6252]

You are such a PROF and you are good in this and its not hard to understand 😉I like it

[@gertrudengoma6315]

Wow prof you really know how to teach i can understand easily work 😊

[@PamelaNkyira]

Thank you prof

[@zidiazulu4728]

So do we multiply by the top number😮😮😮😮😮😮😮

[@DevikaDissanayaka-c8z]

U r so kind

[@WilfredWanzala]

your teachings are the best

[@GraceFadiga]

Superb I really understand now

[@surajbehera3171]

Thanks for clearly explain. I try to 1 year ago understand this eqn but not understand other video. I watch your video and I clearly understand. Thanks again

[@TheMathsProf]

I'm so pleased it helped you understand! Thank you for your comment 😊

[@phindulomulovhedzi7594]

​@@TheMathsProf 2x + 3y = 11 and 4y - 2x = 10.

[@sagaciousowusu1336]

It more essay and undetstand method been introduced which eill. Make students admire your class. Well done prof.

[@fannysapi7232]

Well done you are a good teacher

[@fiyinfoluwaoke9825]

you are very useful in math equation and i just even started watching your channel today because in school we just stated doing this topic today MATH PROF😬😬😬😬😬

[@candyyy388]

This is a great video but I just have one question why do you use the old equation instead of the new equation to do the second part the equation

[@MukuwaKafukwe]

You are a good teacher

[@favmathsconcepts3125]

Well done Prof

[@kerimatabdulwasiu4461]

Thanks I really like the way u teach

[@graceadjei2239]

very understandable maths prof.

[@TheMathsProf]

I'm glad 😊

[@macaulaymatthew8073]

Can you make a video general form of quadratic equation.

[@fahmidachoudhury7589]

But what if you have to times the first one by two

[@mustafahassan1873]

Wat i dont get is 3b+2c=18 2b - c= 5 WHY DID U ADD THEM UP WHEN U HAVE TO SUBTRACT?

[@OAITSE-KEEKAE]

I think that was for elimination of 2c because if u say positive 2 plus negative 2 the answer is zero

[@muniratuyakubu-wt7bk]

Thank you so much ma I really enjoy your teaching

[@ayanbinahsan5311]

Awesome teacher

[@bahitanalishuwa3368]

How come I got X=3 and Y=-1 on the last equation? (I cancelled out the x variables first)

[@SUFFIA-vw1vq]

@The Math Prof What do we have to do if there is a square in the question? e.g y = x^2 - 2 y = 5 - 2

[@kanyamagaraabdallah8300]

oui plusieurs l´humains n´aimez pas le cours de mathemtique , mais s´vous avez rencontre a quelqu´ un connaittre bien nous aller en souvent suiv ce prof , en tout quand je vous remercie ,

[@sundari7670]

4-35 how will be 33

[@jehu....3236]

but how did you get the 33/17 and not the 35/17

[@mercymwangi1196]

Thank you so much teacher im glad now l can solve simultaneous equation confidently

[@gersonrigan-j6c]

Awesome 🎉 GOOD prof

[@dengakol8698]

Congratulations 🎉

[@hridyapillay2275]

hey, I have a doubt how can a question like x = 8 - 2y be solved? 2x + 3y =13

[@grassytramtracks]

For x=8-2y and 2x+3y=13, you can rearrange the first one to be in the same format by adding 2y to each side. That gives x+2y=8 and 2x+3y=13. If you double the first equation it becomes 2x+4y=16. If you subtract the equations, 2x-2x=0, 4y-3y=y and 16-13=3 so we get y=3, that's perfect, the y is already by itself. Then we go back and put that back into any of the equations from before. It doesn't matter which. I'm going to use the first one because it's already in the form x= , so we go x=8-2×3=8-6=2, so x=2 and y=3. For this one I would use the other method for solving simultaneous equations which is by substitution. Because x=8-2y, we can substitute 8-2y in the place of x in the 2nd equation, so you get 2(8-2y)+3y=13 which we can now solve so expand the brackets out: 16-4y+3y=13 tidy up the y's: 16-y=13 subtract 16: -y=-3 flip all the signs: y=3. Then go back and substitute that into one of the initial equations, I'm going to use the first one: x=8-2y x=8-2×3=8-6=2 so x=2 and y=3. As you can see, both methods gave exactly the same answer, it's up to you which one you prefer, I like the 2nd method more myself for ones like this

[@veekay855]

Omg she’s the best thank you so much ❤❤❤❤❤

[@briankomakech7037]

Wow 😲 wonderful...❤

[@GraceGyasi-p7r]

Please if you have a question like X plus 4y = 9 And X plus 2Y equal to 5

[@mikachipg3d534]

Is it possible to get a decimal as answer 🤔

[@bileyare6924]

Plz tell me how i know the number i multiply 🤔

[@grassytramtracks]

Whatever numbers will make the coefficients of either x or y the same

[@roheyatousey7987]

Thanks for explaining substitution method a

[@roheyatousey7987]

Sorry about the a

[@omargibba1776]

You mean if the signs are different it will be added

[@ahgaishsjshahavausshjd6409]

Why did you still use the one you cancel ??

[@onkemetsedikai3797]

I also want to know that one, but I think even if she uses the existing ones the answer will be correct

[@grassytramtracks]

Because the one she crossed out is one she didn't need for the step where you add or subtract the equations, but you can use any of the equations from the beginning to work the other unknown out, it doesn't matter which one

[@BlessingShuuluze]

Thank you to teach me ❤❤

[@scardewalker211]

Thanks for that dear teacher

[@kalyangovincentjoest4870]

Good teacher

[@tabithawanjogu9744]

thankyou you literally helped me do my homework 🥰

[@danielfishaye2729]

Thank you, really. I have test you really helps me

[@DanielNjemanze-yx3bl]

Thanks now I understand ❤❤❤❤❤❤

[@MidasAutmah]

8 - C = 5 must become C = -3 because of the - before C. isn't it?

[@beatricedusabirema1065]

Good work

[@MariaSimeon-xr5en]

I wish you were my math teacher

[@Kikieee977]

she is the best ❤

[@FaustinaMonde]

You are the best 🔥 🔥🔥 uuuu😊

[@jubinhanse-rb8qq]

I like math very much so upload new video

[@AgnessMwanza-mh5pv]

Now I understand mathematics I will get better

[@lillymirembe4474]

In simultaneous equations aren't you supposed to multiply both equations by values found in those specific equations...

[@lillymirembe4474]

Yeah no I get it now...

[@unknown6570]

You are the best. Thank you so much 😊

[@fazezade1474]

why did you multiply the equation by three when you are supposed to x the top one by five and the bottom one by two. 4:40

[@skerpy8145]

You need to have at least one value to be the same

[@grassytramtracks]

You just need to make the coefficient for either x or y the same, it doesn't matter which. Your method would work too

[@zakariyashakir4091]

Thank you bonnie Lass

[@mariancobba4696]

I wish u were teaching chemistry 😪

[@okekechinwemoses7692]

You are a saviour

[@okekechinwemoses7692]

This name math prof doesn't fits you need to look for another better name than that

[@TheMathsProf]

The Maths Saviour, I like it 😆

[@KennedyKaingu-io9gl]

what is45x+47x=

[@grassytramtracks]

You add the numbers in front so it's 92x

[@boljaybol9045]

Cool the first one thing you 🌹🙏

[@imene7322]

you honestly have to understand that this helped me so much thank you, you explain maths so well I will use your channel for every maths subject I don't understand or haven't learnt yet I have a GCSE exam tomorrow and our teacher just wants to know our level I'm in year 10 and we haven't learnt all the topics that will be in our exams so I'm trying to do as many new topics before tomorrow thank you once again !!

[@aaryanarunchander6678]

How would you solve the system of equations? 3x-4y=8 18x-5y=10

[@TheMathsProf]

I would multiply the top equation by 6 so that it becomes 18x-24y=48. Then, when you subtract the two equations the 18x terms will cancel and you can solve to find y. Hope you understand 😊

[@aaryanarunchander6678]

@@TheMathsProf I understand now, thank you!

[@mbuzanavolet1388]

I wish you could help me with maths

[@giftconsolation3971]

Thank you so much 😊👏

[@TheMathsProf]

You're welcome 😊

[@esterngove8096]

Awesome 👍

[@adamahubby2085]

Simultaneous is literally the hardest topic in maths i still dont understand

[@markmale5958]

Am trying hard to understand

[@kaylalaufeyson8828]

These have helped me so much, thank you!

[@TheMathsProf]

I'm so glad! 😄🙌

[@DAXYtheVILLA]

Same attaches to me 😊 she is gifted , may you always stay bless

[@jordinmoir4879]

Hi , I worked out the 5X and 3X but my answer came to 41=X , yours is 4=X

[@amahleyeni4540]

Hi if you worked 5x and 3x your answer should be y=-1 not x =41

[@bahitanalishuwa3368]

I got X=3 and Y=-1

[@deverlyrule4295]

Can you do one like this x + y = 10 2x + y = 13 Plz i am really confused with ones like these hope u see my comment asap

[@ranonymous27]

x + y = 10 a) x2 (multiply by 2 to make the x variables the same) 2x + y = 13 b) 2x + 2y = 20 c) - - - (subtraction) 2x + y = 13 (xs cancel out) y = 7 Put y = 7 in a) x + 7 = 10 x = 3 x = 3, y = 7

[@philipotingo7546]

Just subtract

[@grassytramtracks]

​@@ranonymous27you don't need to make the x's the same, the y's are already the same

[@ranonymous27]

correct, well it's been 2 years, but thanks for the correction@@grassytramtracks

[@KennedyKaingu-io9gl]

slove for 4x+5x=

[@brightmensah8733]

Fantastic.

[@lewisgilfillan9237]

Does it matter which numbers you multiply.

[@AB-lc6lz]

It does not matter its just important that there are 2 same numbers so that you can substract or add them(so that signs wont affect the result)

[@janesoy8734]

I really like the way you are teaching please give out some quiz to learners for practice

[@buhleleana5022]

Awesome teacher, awesome teaching skills 🙏👏👏....🐈

[@maryamjxydbfb]

in school they told us to make the first numbers the same and now your making the second numbers the same. im confused and i have an exam tomorrow and i forgot literally everything in maths

[@ranonymous27]

It doesn't matter which numbers in an equation are made the same, just find the easiest way to make two variables from both the equations the same in order to eliminate

[@MR-nb9nn]

In India we call it quadratic equation it's damn easy to do

[@grassytramtracks]

That's not a quadratic equation, a quadratic equation is one that's ax²+bx+c

[@StevieNakhupe]

Please assist this problem, solve the following 6x+4y_8Z=-56, -x-4y+z=5, 3x+y+9z=10

[@thabhishow4963]

Tq mam

[@NgenoAndreas-kf6fz]

Why are you multipling

[@LayliaJohnson-fu4lr]

Because you need either the c or b's to cancel

[@LayliaJohnson-fu4lr]

Because they need to be the same

[@abubakariliyasugarba6616]

Hello maths prof

[@Tobygtr35]

hi there. I just want to ask a question from the math prof. Are you a real math's professor or is that name just put for fun. pls answer, ok. And if you're really a math's professor what are your qualifications. Pls don't think badly, ok .

[@nonhlesbahle6670]

U did a mistake there: 18 +5 =23 not 28

[@grassytramtracks]

It's not a mistake, you ignore the middle equation with the line through, it's the 18+10 which is 28

[@knowall9150]

You made a mistake on 5(7/17)

[@grassytramtracks]

It's not a mistake, when you multiply a whole number by a fraction, you only multiply the top number by the whole number, not the bottom

[@prof.dr.apollom.sicifm.cia8144]

❤❤❤great❤❤❤

[@JMD_893]

IT works 👍

[@gatchangbiliewkok]

itis clear

[@alihakim9867]

ali from kenya made some improve ment

[@henrymusapa]

Ooh my God😅😅❤