Linear equation word problem | Linear equations | Algebra I | Khan Academy

[@David-mp1pc]

i learn more from a 6 minute khan academy video than a 1 1/2 hr math class period tbh.

[@vandanabhardwaj4674]

David I understand you on a spiritual level

[@helenakiannejad4761]

literally

[@Tiaprosper]

so true

[@elinag5743]

in school we were always allowed to use calculators to divide etc but I appreciate that you show us long division and solve the math out loud. sometimes i think "math is so much work" but when you verbalize the process, it becomes less intimidating. thank you.

[@MrPathorock]

No wonder why students are so dumb now days

[@muhdmultazam342]

@@MrPathorock sad truth but Factos

[@sineth29]

@@muhdmultazam342 "Factos 👀👍" -Cristiano Ronaldo

[@cijae368]

What boggles me is how good you're at writing in a computer

[@wolfiefoxx8713]

Ikr Xd

[@mccow3423]

They use some sort of pad/tablet which you write on with a pen that comes with it, however, they might use a mouse, a computer which is frustrating for me to watch

[@cursory9031]

Literally

[@bewakoofxdevil4439]

@@mccow3423 It is known as a graphics Tablet

[@ZareenKhan-yg9wt]

Ikrr

[@sirnesbit1285]

I find it weird that I can’t seem to grasp a concept during an hour long lecture, yet someone on KZbin in a 10 minute video can easily explain it. Good jerb!

[@ilianastenovitch]

Why can't McDonald just count the trees himself!

[@kyle-ke3eo]

TrysomeofTwentyOnePilotsPhantasticMilkandCookies lol

[@kir_b]

TrysomeofTwentyOnePilotsPhantasticMilkandCookies True 😂

[@DOOMSLAYA99]

lol

[@JCS_ChanX.]

Isten this is just a math problem solving...

[@ramlahassan9761]

Cuz he inherited stupidity from donald trump

[@lorenavelazquez3967]

now i can understand algebra!!! thanks

[@MepiLorna]

This guy's voice is so relaxing that i selpt during the problem

[@ParkerGrigsby]

I'm in eighth-grade and doing algebra 1. This really helps because I'm a year younger than everyone else in my class.

[@yourfuturexstepdad]

Khan Academy and the Organic Chemistry Tutor have helped me through Algebra 1, Geometry, and now Algebra 2. Thank's guys.

[@kylemeade8606]

Just came here for a question. He did all this complex stuff. I did it so much simpler and got the same answer: let x represent the # of trees initally let y represent the # of trees now Therefore x = y + 5 y = 41 790 / 210 x = y + 5 y = 199 x = 204 Therefore the number of trees macdonalds farm initially had was 204.

[@sas-seriousaboutscience6024]

Kyle Meade good

[@arifahmed2876]

Mr. Han won a money and gave half of this money to his mother and 10000,he also gave 1/3 of money to his son ,if his mother got twice the money his son got , find the the amount of money mr.han won in the jackpot

[@SabrinaXe]

Even simpler, you could just directly divide 41790 by 210=199 then add 5. Giving a grand total of 204

[@christinaharris2173]

Sabrina, that's exactly what I did! But this way taught my son how to understand it all!

[@craftygirl1889]

Thankyou Mr.Khan. I really have troulble with algebretic word problems. Your video was the best and pretty much the only helpful video I found. :)

[@sadaftauheed561]

it's not Mr.khan it's Khan academy.

[@HeyItsKora]

(41790/210)+5 = total initial number of trees. As Feynman once said, « why would you do it by algebra if you can do it much easier by arthmetic? ». I find that this is also applies to this situation very well!

[@michaelmelendez7063]

woo hoo im gonna have a mental breakdown due to how much work i have to do by 11:59 and how hard this is quarantine is great

[@dontahawkins]

Thanks now I can start on trigonometry for the GED test

[@king_kuro4931]

TBH i learn a lot from this video, i am watching this video because my teacher in math is not teaching us.

[@sesamerocks9392]

Same here lol

[@TheMinecraftDJStudio]

I did it a simpler way. I don't know if it counts as "linear equations" but this is what I did Let t represents the number of trees 210(t-5)= 41790 210t-1050=41790 210t=41790+1050 210t=42840 210t/210 = 42840/210 t=204

[@fabenhenok2158]

THANK YOU SO MUCH THIS REALLY HELPED!! KEEP DOING WHAT YOU ARE DOING!!!

[@jaygroomes1357]

woah, easy there with the caps lock sparky

[@FaisalAhmad-dm3lq]

@@jaygroomes1357 *5 years ago*

[@Ace-vn2ch]

10y ago

[@rit4237]

idk, i just like your voice

[@mohammedkhan3781]

Pretty useful in real life.

[@alicedreameater8619]

My teacher always taught us the short cut ONLY it's terrible, I'm glad I found this video teaching the original way since I grew up doing math like my parents and not how we do it now.

[@nott.haseeb]

How to make a video 6 minutes long: divide for 3 minutes. I understood a lot btw

[@allenreviews334]

Pov: your math teacher made you watch this.

[@eleitabustinza2299]

Thank you now I understand 🙌

[@mash8561]

thanks alot man this helped me understand a lot

[@Itsnot_filip]

Thank you

[@skimmingwitholdoliver3878]

I find it funny how I learned more from a 5 min video that from a 47 minute math class

[@SahajaJambula]

You should do more examples

[@pickles892]

i am very positive

[@tahwnikcufos]

The association shown in this example is out of order and confusing; the problem only defines "remaining" tree harvest and output. So... t=41,790/210+5, or t-5=41,790/210 not 210/(t-5)=41,790. "t" harvest and "t" output per tree are valueless unknowns and irrelevant to this equation. "t" has no initial association with either value uniquely representing the remaining trees.

[@baura7143]

Your voice sounds like Tyrion Lannister from Game of Thrones.

[@abhisrecitation949]

Ar you get to see the video for learning???? Or playing ??? 😠😠😠

[@ourdate624]

never in my life used this in a real world sitituation

[@pranksteryt5960]

the biggest thing that fascinates me is that he managed to divide with such a big number like 210 and actually get a right answear without a calculator, i didnt know that method existed since i have not been taught that yet in school i gues.

[@kyawoue]

long division is a 3rd or 4th grade lesson tho

[@eunicepena5535]

hi can you answer this immediately:) In U. S., a monthly electric bill(b),in dollars, consist of a $20 monthly fee plus $0.07 per kilowatt-hours (k) of electricity used. The amount of the bill is a function of the kilowatt-hours used and is given by b=0.07k+20.Estimate the bill if 1,500 kilowatt-hours of electricity is used.@KhanAcademy

[@eunicepena5535]

notice me please

[@skullzz6291]

0.07x1500+20

[@achrafabouras2118]

Im 26 why does this still boggle my mind so much

[@joonsjams]

But isnt it easier to transpose the 5 to the other side instead of saying add 5 to both sides? Or it just really depends on a person's perspective?

[@Cr1Ro7]

He was trying to overcomplicate everything

[@RomanSoldier-]

2:28. Lmao nice

[@Andriythegaint15]

I'm trying to study for the military test and I'm not allowed to use a calculator so it's kinda hard to brake these math problems down so this kinda makes it easier

[@LubaLuba1]

I would support you guys, but I have to be honest I just discover Khan Academy today. But I really concern with the math in schools these days its like the stuff we covered when I was in 8 grade but with added nonsense difficulty and I don't feel students are learning more just dealing with obstacles instead of learning more math.

[@laylayboofleming]

What would the slope be for this equation?

[@theextinctsurgeon310]

I was wondering that why you didn't do this 210*t and 210*-5. that would shorten the equation to this: 210t-1050=41790, then throw the -1050 to the other side and you would get an equation of: 210t= 41790+1050. then divide and get the value of t

[@omeirxbox360]

He did that in the video you idiot.

[@vaishu1462]

Damn......

[@wolfiefoxx8713]

So this is the knitial value?

[@leilaalexandra6464]

I can understand most of it besides, why did you add 5 to both sides? I need help with that! How do you know what to add on each side?

[@samer1999]

i love you

[@RetroGamingClashOfClans]

got it cause he ut down 5 trees and it asks for the initial number of tree

[@giovannidinunzio1547]

Nice

[@DeepakSingh-wv5wl]

You can simply divide 41790 by 210 which shows no. Of trees left after cutting and the simply add 5(no. Of trees which were cut).Why such a long process.

[@hesrey6734]

and why did we use algebra for this ...I got the same answer by dividing then just adding 5

[@gsailu3471]

Sir why u divided 210 on both sides

[@Hitchxi11]

41790/210 = 199 trees + 5 trees he cut down = 204 trees initially.

[@onesandzeroes]

I wonder why he didn't remove the zeros when doing the division

[@kamikaze10anims85]

Pawel X ikr

[@devilyt4157]

🖕🖕🖕🖕

[@shahadalzamil2199]

I just divided the total by 210 and added 5? Why all the headache

[@gauche2781]

So.. the answer is 204 ?? for every steps he did just to find 204. on this math problem there is a short way he brought us on the long way.

[@emillayco7111]

How come the equation looks 210(t-5)=41,790. Isn't it the the remaining trees produced the 41,790 not included the cut down trees? so the equation for me must be 210(t)-5=41,790

[@aavajacksonn]

So I got this word problem: Plant A is 5 cm tall and growing at the rate of 3 cm a month. Plant B is 4 cm tall and is growing at the rate of 5 cm a month. When will plan B exceed the height of Plant A I don't know how to set up this equation, so I put an equal sign between them? I don't know :(

[@DeepakSingh-wv5wl]

In just one month

[@Groot716]

Someone help me. 204 are total trees or after 5 tree cut .

[@SuperParadise21]

Thanks for this video, so damn dope!

[@kaibaCorpHQ]

The whole problem hinges on the fact that each tree produces exactly 210 oranges. Is it an average or something?

[@venticocean8664]

why do you minus with the 41,000 and 210 and not 790-210?

[@pickles892]

umm accually no

[@NewOneTvMo]

U forgot a 0. In the3 first example, while u were dividing.

[@MrFred-fd7wc]

McDonald’s doesn’t have oranges 😂

[@moonexpr]

Why not just backtrack using the cloud method? *It's was faster*

[@RetroGamingClashOfClans]

why did ya add 5?

[@vaivislaslukas]

+Retro Gaming - Clash Of Clans no one cares m8. Get laid.

[@theoshjosh7957]

Whatever you do to one side you have to do to the other

[@lindasweetdog3735]

la traduzioni in italiano ti porta fuori strada, la domanda dovrebbe essere: un frutteto produceva, prima che venissero abbattuti 5 alberi in totale 41790 arance, ogni albero ne produce 210, quanti alberi c'erano in origine? Invece così com'è messa la domanda è fuorviante

[@soushi__179]

why cant we use the calculator for our math test tomorrow???!?!?!??!?! 😑😑😫

[@rdrip1219]

he could have just used a calculator for that long division smh

[@k1ssl4ndd]

hey is there any sixth graders doing this kind of math here? ;-;

[@KeyBrute]

Nah I'm a junior in highschool leadning this

[@ZaBaoi]

Macdonald what! It’s McDonald.

[@brandylagrone4939]

I still don't get it 😃

[@apocalypsegaming9453]

hey brandy is you just divide 41790 oranges with 210 then you would get 199 but since they said 5 trees were cut off you would add 5 to 199 so you would get 204 hope this helps.

[@arifahmed2876]

Question about mo ney

[@cess5614]

7/21/22

[@shalubansal273]

your voice was so slow

[@Confusion4U]

😶

[@sparsharegmi1139]

Mac new but we dont know🙄

[@jeremys3951]

Math is such a waste of time

[@andreicecold4379]

i dislike this comment, i agree with sashimi is bad

[@Aisha-gd6dq]

I failed math because of these problems bye

[@ASURA-47]

God I loved Old Macdonald but this is *too* far.

[@brandoncollier150]

has no sound

[@michawilke]

You choose a demotivating problem to teach equation solving, because any intelligent student will tell this MacDonald to just count his trees: much simpler solution and a better one, too! Only an idiot would believe the premise, that each tree will produce EXACTLY 210 oranges. This is not a real problem solved by math, it’s just a more or less fancy riddle solved by math. Are you teaching the people math to get them better at solving riddles on the last page of a quirky math teacher magazine, or to solve real world problems….?? Your dedication is remarkable - kudos - but setting the goal right, could make a much bigger contribution to peoples lives. Don’t only teach math, teach swift real world problem solving with math.