Solving Equations

What is the inverse of addition?

• addition

• subtraction

• multiplication

• division

What is the inverse of subtraction?

• addition

• subtraction

• multiplication

• division

What is the inverse of multiplication?

• addition

• subtraction

• multiplication

• division

What is the inverse of division?

• addition

• subtraction

• multiplication

• division

Why do you have to do the same thing to both sides of an equation when solving for the variable?

• To maintain equality

• Because it's fun

• You don't have to

• To keep both sides balanced

What do you have to do to both sides to solve the following equation:  $5x\ =\ 55$  

• add 5 to both sides

• subtract 5 from both sides

• multiply both sides by 5

• divide both sides by 5

What do you have to do to both sides to solve the following equation:  $x\ +\ 8\ =\ -20$  

• add 8 to both sides

• subtract 8 from both sides

• multiply both sides by 8

• divide both sides by 8

What do you have to do to both sides to solve the following equation:   $x\ -\ 7\ =\ -13$  

• add 7 to both sides

• subtract 7 from both sides

• multiply both sides by 7

• divide both sides by 7

What do you have to do to both sides to solve the following equation:   $-9\ +\ x\ =\ -21$  

• add 9 to both sides

• subtract 9 from both sides

• multiply both sides by 9

• divide both sides by 9

What do you have to do to both sides to solve the following equation:   $\frac{x}{3}=13$  

• add 3 to both sides

• subtract 3 from both sides

• multiply both sides by 3

• divide both sides by 3