One-Step Equations

What what is the inverse operation of subtraction?

• addition
• subtraction
• multiplication
• division

Solve the equation
3x = 27. 

• x = 24
• x = 81
• x = 9

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.

y - 33 = 147

• y = 114
• y = 177
• y = 180
• Answer not Given

Solve the following equation
X + 8 = 15

• 23
• -7
• 7
• -23

Solve the following equation 
8 = m - 12

• 4
• 0.5
• 5.0
• 20

Solve the following equation
18 = 3b

• 15
• 6
• 21
• 54

What would be the best first step to solving the equation?
-3=x+5

• add 3 to both sides
• subtract 5 from both sides
• add 5 to both sides
• subtract -5 from both sides

What would be the best first step to solving the equation?
-18=m+12

• add 18 to both sides
• subtract 18 from both sides
• add 12 to both sides
• subtract 12 from both sides

Solve the equation:
x - 3 = -12

• x = 9 
• x = -15
• x = -9
• x = 15