Combine Like Terms

10/10/2015

Tapasya

10/10/2015 02:40:59 pm

First ツ
So basically to simplify the equation, you add, subtract, multiply, or divide the coeffiecients of the variable first before using inverse operation to solve for the variable.
Ex. 3x+4x=7

Mr. Bigsby

10/10/2015 04:59:20 pm

Yes, we always want to simplify the equation as much as we can before we start using inverse operation.
But 3x + 4x = 7x
Unless that was your equation then it becomes 7x = 7 then divide both sides by 7 to find that x=1

Tapasya

10/10/2015 07:07:01 pm

Yah. I mean that as my equation. 3x + 4x = 7
7x = 7
x = 1

Natalie Tario

10/11/2015 12:54:38 pm

Hi this video was really useful and helpful

Josie

10/11/2015 08:28:27 pm

At first I didn't understand, it didn't really make sense to me but then I read tapasya's comment and how she explained it in simpler terms and I watched back through the video and I got it!!

Tapasya

10/12/2015 04:52:00 am

Yay! ツ

Jordan Christian

10/12/2015 12:30:42 pm

Dennis

10/12/2015 04:08:44 pm

Really man? Just a "Hi"?

Victoria

10/12/2015 12:52:12 pm

Cora C.

10/12/2015 12:58:35 pm

So (just a random thought here), what if all of the values in the equation are followed by variables?

Cora C.

10/12/2015 01:00:39 pm

…different that is

Scott

10/13/2015 01:54:42 pm

Then you couldn't really do anything with the equation unless you are allowing infinite solutions, as there would be an infinite number of variable amount combinations to any equation done in this way. That is, if this rule is only on one side of the equation, otherwise combine like terms.

Mr. Bigsby

10/13/2015 03:16:39 pm

Scott is correct. More than one (different) variable will create a line with many solutions.

Angie L.

10/12/2015 01:09:29 pm

-7x-14=2x+-7

Blake

10/12/2015 01:26:53 pm

Thanks for the video it really helped but i still dont know which variabes to use to subtract and add. You said that you just pick the easiest one but i dont know how to determine which one is easier

Scott Talley

10/13/2015 01:58:22 pm

Use SADMEP to determine the order; note that this is essentially PEMDAS backwards, but remember to use the distributive property to eliminate parenthesis first. (so I guess it would be PSADME)

Mr. Bigsby

10/13/2015 03:20:07 pm

As long as you apply the inverse operation to both sides it doesn't matter which variable you choose to add/subtract. But tend to add/subtract the smaller one so that it is easy to move to the other side.

5 + 100x = 7 + 3x

I would subtract 3x from both sides because 100x - 3x is easier than 3x - 100x.

5 + 97x = 7

Mia Williams

10/12/2015 01:40:27 pm

At first I didn't understand all the steps to do with these problems, but now I understand it better.

Krista Martin

10/12/2015 03:38:15 pm

Cora I think if all the values had different variables the equation is already in its simplest form

Mr. Bigsby

10/12/2015 04:59:37 pm

Yes, if there are more than one different variable like "x" and "y" then it cannot be solved for an exact amount. It would create a line with lots of solutions!

Ray Sutton

10/12/2015 04:30:53 pm

Very useful video I didn't quite understand if you had a different variable but the video helped a lot.

The Mysterious Man Nobody Knows

10/12/2015 04:43:03 pm

Sup everybody, I'm back!

Emmett (Totally not The Mysterious Man Nobody Knows)

10/12/2015 04:48:23 pm

Mr. Bigsby what would 19x+77y4=85x-3y?
Or is that impossible?

Mr. Bigsby

10/12/2015 05:02:44 pm

77y4 isn't really written correctly. If you mean to multiply each of them place a parenthesis between them. 77y(4)

But anyway, your equation has two different variable so it is a line with lots of solutions. You must provide a "y" value or "x" value to solve for the other variable.

Jack Epp

10/12/2015 06:43:27 pm

HEY! Monday Night Football!!

Scott

10/13/2015 02:01:05 pm

It's Tuesday by the time I've read this, so HEY! Tuesday Night Football!!

Autumn

10/12/2015 06:56:40 pm

This video helped

Ashton

10/13/2015 02:03:23 pm

isaiah

10/13/2015 04:05:57 pm

This helped me understand better

Ben Currie

10/13/2015 04:25:44 pm

Hello
What if you did
x7+7x= 14x?
Does the order matter
I would guess not

Mr. Bigsby

10/14/2015 08:15:22 pm

"x7" should really be written as "7x"

1000000 dollar Bill Gates

10/13/2015 05:28:34 pm

87+54x-67x+853 its random but i wanna see an answer

Mr. Bigsby

10/14/2015 08:16:33 pm

It needs an equal sign to be solved. It can be simplified to:
121x + 940 = ?

Jaden Zimmerman

10/16/2015 09:01:54 am

121x + 940 = 1 !

Kate

10/14/2015 06:34:09 pm

5x+ -7 + 4x +7t = 9x + -7 + 7t isnt it something like this or so

Mr. Bigsby

10/14/2015 08:17:45 pm

This has two different variables so it will create a line.

jacob

10/19/2015 01:14:38 pm

Sean

10/26/2015 03:38:24 pm

Cool

Avery

10/26/2015 03:49:56 pm

I watched this video I just didn't comment

Hayden

10/27/2015 12:04:51 pm

Sup

Combine Like Terms

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