Addition and Subtraction of One Step Equation

Solve the equation for the missing variable:

x + 12 = 20

• x = 32

• x = 8

• x = 15

• x = 30

Solve the equation for the missing variable:

y - 33 = 147

• y = 114

• y = 180

• y = 177

• Answer not given

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.

What equation matches this situation? Jack had some markers and then bought 6 more. Now he has a total of 10 markers.

• m - 6 = 10

• m + 6 = 10

• 10 - 6 = m

• Answer not Given

17 = x + 3

• x = 20

• x = 14

• x = 13

• x = 19

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

x + 12 = 20

• x = 32

• x = 15

• x = 8

• x = 30

Solve the equation.
19 = p + 5

• 14

• p = 24

• p = 14

• p = -14

Summarize how you solve the equation below.

• Subtract 12 from both sides of the equation. (take 12 from the 12 +x side and take 12 away from 50)

• Subtract 12 from the right side of the equation. (just take 12 away from the 12 + x side)

• Subtract 50 from both sides of the equation. (take 50 away from the 12 +x side and 50 away from 50)

• Combine 50 and 12

Solve the equation. 
54 = s + 34

• s= 10 

• s=20 

• s=34

• s=14