Solve a System by Graphing, Substitution, Elimination

To solve a system of equations we can graph, solve by substitution or by elimination. In this video we will cover all three.
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[@BlooplyLooply13]

You're my go-to math teacher. Your videos have made summer school easier, especially because I'm learning completely new material at such a fast pace. I really need this, thank you.

[@Daviddrt.]

Thank you I have a test on all three in 12 hours this has really helped.

[@jsmoss5081]

You explain this a lot better than my professor, she just right notes and expects you to figure out each step on your own

[@sockpocketpre-alpha8258]

Dang what’s your English professor doing smh

[@___king___]

@@sockpocketpre-alpha8258 english?

[@sockpocketpre-alpha8258]

@@___king___ I think there was a clever joke in there somewhere but I can't remember what is was.

[@akapasokopo]

@@sockpocketpre-alpha8258 XD

[@TheNamedVirtue]

Excellent video! I'm relieved you decided put all three methods in one video.

[@SilverStorm68]

I know i am late to the party, but thank you so much! If i don't pass this test, i'm going to loose out on High school credits, and i now fell 10x more confident in myself and my ability to do this!🙂

[@hypeoptic654]

Thank you so much for this compilation! I have a test on all of these in 2 days.

[@brianmclogan]

Boom!!

[@MrMrMrMr.-mg5fu]

Send the test to me please

[@rachelrose8021]

wow this helped a lot i have a test pretty soon good video!

[@user-it6sm4vc8p]

such a great teacher👍👍👍👍👍👍

[@akapasokopo]

Is the graphing in the first correct?

[@kittycatgamer3327]

Idk 🤷‍♀️

[@Ba_A]

At 4:30 the graph solution given is not correct. The correct solution should have been (-2, -5). The graph was crooked.

[@TeacherinNJ]

I noticed that, too. If he would have plugged them into the original equation he would have caught his mistake. I love his videos but you’ve got a keen eye there.

[@gravethedawnx4885]

you make everything so easy can you please make videos on the harder things like quadratics and stuff

[@brianmclogan]

I have hundreds of videos on quadratics. Check out my playlists on my channel

[@vecteevs]

So talented math teacher!

[@kittycatgamer3327]

Agreed 🎉❤

[@Buffering710]

You just saved my grade thank you so much.😁

[@brianmclogan]

You are very welcome!!

[@tearz__1125]

I love this man

[@Speedy653]

Bro tysm, I needed this badly

[@Nikhilesh_Mavuru]

This is so helpful

[@Keepyourthoughtspositive]

I found graphing so confusing since you were a bit fast found it even shed to register anything 🙁🙁😩😩

[@MrMrMrMr.-mg5fu]

I am not understanding is there other way simpler

[@VANEKsubsribe4cookie]

Yes

[@angelm3853]

It's over for you

[@Wally_darling-thewriter]

Well try to listen and then take notes on what he tried to explain. Or just what did you not understand?..

[@nutglaze]

This dude elaborates too much it's confusing the students. Like when he says "you can replace them or substitute" like bruh just say substitute just keep it short and sweet they'll lose attention. Also simplify your vocabulary to them

[@akapasokopo]

I don’t know what to say..

[@zachhlovesmyyself]

What grades do you teach?

[@kathryncost851]

lizzie needa stop yappin

[@lotusflower7042]

my balls yappin

[@zesrdtfyguhiasdasfv]

i think the first one is wrong because i got (-2,--5,) i am using graph paper and i dont see the solution. Good video just a heads up

[@ninacilliers3225]

I tried it out on my own, and got the same answer as Mr.McLogan... also --5 is not a number. Remember that two negatives cancel out and give a positive number.

[@kittycatgamer3327]

@@ninacilliers3225 yes, two negatives equal a positive 😀

[@mynameisbakr]

11:04 what if it was 0

[@hamidzaidi4431]

This is like a level maths. It’s dam hard

[@Chickenfireball-pj9gl]

3 hours of studying fit into 13 minutes

[@1nsporational_20]

at 6:43 why does it -2x+4, and not 2x - 4 ?? someone pls expain

[@jiyang4602]

How did you get 2x - 4? You should only subtract 2x from both sides to eliminate the x and so, the y will remain.

[@TeacherinNJ]

You want to put it in slope-intercept form (y=mx+b) to keep it simple. Therefore, put the -2x before the 4. You never take the sign away from the number, so 2x cannot become -2x, and 4 cannot become -4. Since the negative is on the 2x then you have -2x and since the 4 has no sign it stays positive 4.

[@akapasokopo]

How do you get 2x-4?

[@hamidzaidi4431]

I don’t understand the way you’ve shown it why adding or subtracting in the first step of the equations

[@ronaldjorgensen6839]

graph 1/4 pi in abstraction @ 45 degree rms sine wave as example also launch measure probe from 0/0 to intersect peak power inertia path of first 3 harmonicsmy pen goes dry trying

[@johnnolen8338]

Why be a troll? McLogan is teaching basic algebra here, which has nothing to do with sine waves, peak power, or rms values. Though given the content of your comment I suspect that you don't know what any of those words mean yourself.

[@akapasokopo]

@@johnnolen8338lol

[@akapasokopo]

@@johnnolen8338lol 😂

[@user-bc6kv1br2e]

why did 12y+(-12) make it x=2 i dont get it pls someone understand

[@akapasokopo]

-30 and -28 made it 2. 12y is cancelled so it’s gonna be 0

[@mikesmith7620]

Sir, are you by any chance taking students who've finished school? 😂😂

[@brianmclogan]

What do you mean?

[@kittycatgamer3327]

@@brianmcloganit is a joke 😂😂😂

[@dahyununsworth3106]

Kalbo

[@stephennjogu5599]

😂 it

[@CHIISANA_OTEN]

this is really good! compiling related videos!