Combining like terms

Combining like terms

TL: How do I combine like terms in an expression and in an equation?

Let's watch:

https://www.youtube.com/watch?v=1DgDt6gCUKs

So, we collect then combine the like "terms".

A term is anything separated by an addition or subtraction sign. (example: 2x-4, the terms are 2x and -4.

Multiple Choice

Combine the like terms:

5x + 9 - 4x = ______?

• x - 1

• x - 9

• x + 9

• x + 1

One more video:

https://www.youtube.com/watch?v=iy8QbNyzEvw

Now, let's watch these in equations:

https://www.youtube.com/watch?v=wShnYemIr28

Remember these steps!

• 1. Decide which side of the equal sign you want variable.

• 2. Move all variable terms to the left side of the equal sign using the inverse operation.

• 3. Move all non-variable terms to the opposite side of the equal sign using inverse arithmetic operation.

• 4. COMBINE the like terms.

• 5. Solve for the variable (letter).

Great job!

Let's do three more

Multiple Choice

Solve the following equation for  $x.$ 

  $5x\ -\ 6\ =\ 8\ -\ 2x$  

•  $x\ =\ 2$  

•  $x\ =\ -4\$  

•  $x=\ -5$  

•  $x\ =-1$  

Multiple Choice

Solve: m - 3 = 2m + 9

• m = 2

• m = 8

• m = -3

• m = -12

Multiple Choice

• p = -5

• p = -6

• p = 7

• p = 8