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?

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Answer 1 · 2017-02-27T18:05:47

He walked dogs for 5 days.

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

#6+3d=21#

Where d = days walked.

Now you solve the equation.

#6+3d=21#

1: Subtract 6

#3d=15#

2: Now divide both sides by 3.

#d=5#