SOLUTION: You have spent $315 on equipment. To clean the office you use $4 worht of supplies. You charge $25. How many offices must you clean to break even?

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Question 179089: You have spent $315 on equipment. To clean the office you use $4 worht of supplies. You charge $25. How many offices must you clean to break even?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the number of offices you clean
:
4x+315=25x
:
21x=315
:
highlight%28x=15%29offices to break even