Solving Equations and Simplifying Expressions

Simplify by combining like terms:

n -10 + 9n -3

• -3

• 9n-3

• n

• 10n -13

Simplify by combining like terms:

7v + 2 + 12 + 2v

• 23

• 23v

• 9 + 14v

• 9v + 14

2r + 2 + 5r - 2 + r 

• 8r 

• 8r - 4 

• 12r 

• 7r + 4 + r 

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

10x = 90

• x = 80

• x = 100

• x = 10

• x = 9

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

r - 18 = 27

• -45

• 45

• -9

• 9

Solve for x:

• x = 20

• x = 7

• x = 10

• x = 3

What equation matches this situation? Robyn had some video games then bought 4 more. Now she has a total of 10 games.

• v - 4 = 10

• v + 4 = 10

• 10 - 4 = v

4 + b = 30

• -34

• 34

• -26

• 26