One Step Equation Addition

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

• 55 + x = 145

• 145x = 55

• 55 - x = 145

• 145 (55) = x

Working together, Joy and Steve collected 53 pounds of aluminum cans for recycling. If Joy collected 20 pounds, find the number of pounds, x, that Steve collected. Using x as your variable write an equation to solve.

• 20x=53

• x-20=53

• x-53=20

• x+20=53

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.
  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

Which of the following is used to solve single step equations mathematically?

• substitution

• inverse operations

• frequency

• data analysis

y - 14 = 66

• 80

• 52

• 79

• Answer Not Given

m - 5 = -10

• -15

• 15

• -5

• 5

-13=m-7

• 5

• -9

• -6

• 19

-16+k=-11

• 8

• -9

• 5

• -6

K+37=54

• -16

• 19

• 18

• 17