# Ross charged $6 to wash a dog and then $3 each day to walk the dog. He earned $21. How many days did he walk?

##### 1 Answer

Feb 27, 2017

He walked dogs for **5** days.

#### Explanation:

If he charged $6, then $3 per day of walking, then you can make a linear function of:

*Where d = days walked.*

Now you solve the equation.

1: Subtract 6

2: Now divide both sides by 3.