Two Step Inverse Operations

To undo addition....

• Subtract

• Multiply

• Add

• Divide

To undo multiplication...

• Add

• Subtract

• Multiply

• Divide

To undo subtraction...

• Add

• Subtract

• Multiply

• Divide

What is the first step to solve -2x + 1 = 9?

• Add 2x to both sides

• Subtract 1 from both sides

• Add 1 to both sides

• Subtract 2x from both sides

15 = 2a + 7

• 2

• 4

• 12

• 14

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.

Figure out what n equals in this equation:
6n + 4 = -26

• n=-6

• n= -5

• n= 8

• n= -4

In the equation 4p = 20 the variable, p, is being multiplied by 4. How should you show your work to isolate the variable and solve the equation?

• Multiply both sides by 4.
  The solution is x = 80.

• Subtract 4 from both sides. 
  The solution is p = 16.

• Add 4 to both sides. The solution is p = 24.

• Divide both sides by 4. The solution is p = 5.

Solve the equation.

• y = 3

• y = -3

• y = 4

• y = -4

x - 8 = -5 

• 13

• -13

• 3

• -3