Unit 4a Review

Choose 2 answers. Which of the equations have x=15 as the solution?

• 3x =15

•  x/3 =1.5

• 2/3x=10

• 4 + x=  19

• x-12=27

Solve the equation: 2/5x=4

• 1/10

• 8/5

• 10

• 20

• 3

• 6

• 8.3

• 9

• 18

Luis and Victor were both trying to solve the equation 5x = 20. Luis multiplied both sides of the equation by the reciprocal of 5. Victor divided both sides of the equation by 5. Who solved the equation correctly?

• Luis

• Victor

• both Luis and Victor

• None of them

Jen needs more than $120 to go camping. She has already saved $30. Which number line BEST represents the possible amounts of money Jen would need to save to go camping?

• 
• 
• 
• 

Jackson's mom is 44, which is four times as old as Jackson. What is the equation that represents this situation and what is Jackson's age, x?

• x+4=44

  x=40

• 4x=44

  x=11

• 4x=44

  x=40

• 44x=4

  x= 1/10

Tim used 15 boards for each crate that he built. Which of the following expressions represents the total number of boards he would need to make n crates?

• 15-n

• n+15

• 15n

• n/15

A water bottle has 20 ounces in it. After you drink x ounces of water, there are 8 ounces left. Which equation represents this situation?

• 20-x=8

• x-20=8

• 20x=8

• 8x=20