one step equations

What is the solution for x + 9 = 21

• 10
• 12
• 11
• 13

If one roll of masking tape costs $1.15, how many rolls can Emma buy  with $5.75?

• 1.15(5.75) = x
• 5.75x = 1.15
• 1.15x = 5.75
• x = 1.15/ 5.75

Ashley finds masking tape in packages of 4 rolls for $4.32. What is the cost of one roll in  the package?

• 4x = 4.32
• 4.32x = 4
• 4(4.324) = x
• 4/ 4.32 = x

Andrew has saved $55 toward the purchase of an IPOD. The IPOD costs $145. Which equation represents the amount Andrew needs to save to by the IPOD?

• 55 + x = 145
• 145x = 55
• 55 - x = 145
• 145 (55) = x

In 2010, a tree was 8 feet tall. In 2011 the tree was 14 feet tall. Which equation would be used to find how many feet the tree grew?

• f + 8 = 14

• f - 8 = 14

• f/8 = 14

• 8f=14

Joey and four of his friends went out to eat. They decided to split the bill evenly. Each person paid $11.13. What was the total bill? Write an equation you could use to solve this equation. Use d as your variable.

• d/4=$11.13
• 4d=$11.13
• d/5=$11.13
• 5d=$11.13

What is the solution for x + 9 = 21

• 10
• 12
• 11
• 13

Solve for b
2b = -16

• 8
• 4
• -8
• 3

• x = 20
• x = 7
• x = 10
• x = 3

x - 8 = -5 

• 13
• -13
• 3
• -3