Solving Multiplication and Division Equations

Procedure

• Isolate the variable by performing the inverse operation on the number that is attached to the variable.

• The inverse of multiplication is division. The inverse of division is multiplication.

• Use the “Golden Rule.” Perform the same operation on the other side of the equal sign.

Example

The inverse of division is multiplication.

Repeat the operation on the other side.

·3

103

m

103

m

30m

·3

Check. Use the original equation.

30

103

m

103

30 30

Example 2The inverse of multiplying is dividing.

105

7105

b

7105 b

105

105

7b

Check

7105 b

7 = 7

105

77105