Combining Like Terms

2x - 5x =

• -3x
• 3x 
• -3
• 3

Simplify:
2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

Collect like terms: 
4y + 8d - 2y + 3d

• 11d + 6y
• 11d + 2y
• 6y + 5d

A coefficient is __________.

• the variable
• a constant
• an exponent
• the number that comes before the variable

A variable can be _______?

• Any number

• Any letter of the alphabet

• only X

• only 1

Simplify: x + 3x + 6x + x

• 9x

• 11x

• 2x + 9x

• Can't be simplified

6 (x + y + 7)

• 6x + 6y + 42

• 12xy + 42

• 6x + 6y + 7

• 6x6y + 42

Use the distributive property to identify the equivalent expression.

 $9\left(8c+9v-10\right)$  

•  $72c+9v-10$  

•  $72c+81v-90$  

•  $17c+18v-1$  

•  $17c+9v-10$  

Distribute the "−" sign outside the parentheses.

 $-\left(c+v+d+19\right)$  

•  $-c+v+d+19$  

•  $-c-v-d-19$  

•  $-1+c+v+d+19$  

•  $c+v+d+18$