Equations Review (EE.6)

Which equation has x=9 as a solution

• 4 + x = 12
• 5x = 45
• 2x = 20
• x + 7 = 26

Carlos has 8 Xbox games. Carlos has twice as many (or two times as many) Xbox games as Jayda.

Which equation represents how many Xbox games Jayda has?

• C = 8

• J = 8 x 2

• 8 = 2 x J

• 8 = 2 + J

• J - 2 + 8

Janeen's mother is 47. She is 26 years older than Janeen. Which equation can be used to find Janeen's age j?

• j + 26 = 47

• 26j = 47

• j - 26 = 47

• 47j = 26

Kelly earned $20 for babysitting. She has also earned money by doing chores. Altogether, she has earned $100. How much did she earn doing chores?

• $5

• $20

• $80

• $120

19  + a  =  -50

• a = -950
• a =  -69
• a = -31
• a = -50/19

Solve:
-4x = 24

• 20
• -20
• 6
• -6

A solution is...

• A variable that results in a true sentence

• A mathematical sentence showing two expressions are equal.

• Numbers expressed using exponents

• The value for the variable in an equation.

An equation is...

• a problem that contains at least one variable and at least one operation; no equal sign

• a mathematical sentence showing two expressions are equal.

• The solution for a variable

• The value that results in a true sentence

What is the inverse operation of division?

• Division
• Multiplication
• Addition
• Subtraction

What is the inverse operation of subtraction?

• Subtraction
• Multiplication
• Division
• Addition