Question

Beth swam laps to raise money for a charity. Beth raised $15 plus $0.65 per lap that she swam. She raised a total of $80.00.

Let x represent the number of laps Beth swam.

What expression completes the equation to determine the total number of laps Beth swam?

How many laps did Beth swim?

Answer 1

Beth swam 100 laps.

Explanation:

15+0.65x=80

15-15+0.65x=80-15

0.65x=65

0.65x/0.65=65/0.65

x=100

Answer 2

The expression you would use is 15 + .65x = 80. If you solve for x, Beth swam 100 laps.