Question

What should be done to solve the following equation?

x - 9 = 13

A: Add 9 to the left side of the equation.
B: Subtract 13 from both sides of the equation.
C: Subtract 9 from both sides of the equation.
D: Add 9 to both sides of the equation.

Answer 1

D: Add 9 to both sides of the equation

This is because when the number is positive or negative, you use the inverse operation to solve.

Answer 2

D: Add 9 to both sides of the equation
This is because when the number is positive or negative, you use the inverse operation to solve.