algebra
posted by Anonymous .
suppose you are starting an officeclening service. You have spent $315 on equipment.To clean an office, you use $4 worth of supplies.Yoou charge $25 per office. How many offices must you clean to break even?

Solve this equation:
Costs = Revenue
315 + 4x = 25x
x is the number of offices cleaned.
The answer will be an integer.