Equations Review

Solve the equation:
-5x = 25

• x = 20
• x = -20
• x = -5
• x = 5

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides
• Subtract 11 from both sides
• Add 11 to both sides
• Divide 3 on both sides.

-4x+1=21

• x=120
• x=5
• x=30
• x=-5

Solve for x:
-30 - 5x = 120

• x = 18
• x = -18
• x = 30
• x = -30

15 = 2a + 7

• 2
• 4
• 12
• 14

 x / 2  - 5 = 3

• x = -2
• x = 2
• x = 16
• x = 8

• x= 12
• x= -12
• x= -22
• x= 22

• x= 6
• x= -6
• x= -8
• x= 8

Talk time Phone Company charges $0.12 per minute of phone use plus a monthly service fee of $8.00 for its phone service.  Which equation below can be used to find c, the total cost for one month when m, minutes are used?

• c = 0.12m + 8m
• c = 8m + 0.12m
• c = 0.12m + 8
• c = 0.20m

Terry had his car repaired at Ace Auto.  He was charged $50 per hour of labor plus $150 for parts.  His total bill for the repair before tax was $375.  How many hours of labor was Terry charged for?

• 2.5 hours
• 4.5 hours
• 7.5 hours
• 10.5 hours