Expressions and Equations

Simplify the following expression:
-10x + 15 - 3x + 2

• 13x² + 17
• -13x² + 13
• -13x + 17
• -7x + 17

Simplify:
11x + 12y + 1y + 10x - 2

• 13y + 21x - 2
• -13y + 21x - 2
• -1y - 2x 
• 13x + 21y - 2

Combine like terms
3x + 2x + 3y - 7y

• 5x + 10y
• 5x + 4y
• 5x - 4y
• 5x -10y

Simplify:
-1x + y - z + 10z + 2x - 10y

• 1x - 9y + 9z
• 1x - 9z - 9y
• -1x - 9z - 9y
• -1x - 9 - 9y

3(2c - 5)

• 6c - 15
• 6c + 15
• 6c + 15
• -6c - 15

Simplify the expression: 7+3(1 - 2x) 

• 21 - 6x
• 10 - 2x
• 10 - 20x
• 10 - 6x

 t - 4 = 12

• t = 16
• t = -8
• t = 8
• t = 3

 6b = 30

• b = 36
• b = 5
• b = 24
• b = 180

2x + 6 = 14

• x = 4
• x = 10
• x = -4
• x = 3

-3x + 5 = -13

• x = -6
• x = 2
• x = -5
• x = 6