40.7k views
4 votes
Ronnie charged his customers a flat fee of $25 to

fix computers. Then he charged $20 for each hour
that he spent fixing the computer. If Ronnie made
$175 off of his first customer, how many hours did
he spend working?

User Tim Ward
by
4.2k points

1 Answer

6 votes

Answer:

  • 7.5 hours

Explanation:

Let the number of hours is x, then the following equation reflects the full charge:

  • 25 + 20x = 175

Solve it for x:

  • 20x = 175 - 25
  • 20x = 150
  • x = 150/20
  • x = 7.5

Ronnie spent 7.5 hours.

User Kirill Shalnov
by
4.2k points