Make sure all fraction are simplified in the final answer.Review Example 1. Then find the...

Make sure all fraction are simplified in the final answer.

Review Example 1. Then find the value of x in of the following.

EXAMPLE 1

Find the value of x if .

Solution

First we will change the division problem to an equivalent multiplication problem.

x represents a fraction.

 In the numerator, we want to know what times 7 equals 21. In the denominator, we want to know what times 8 equals 40.

Thus .