Problema Solution

Suppose you are starting an office‐cleaning service. You have spent $315 on equipment. To clean an office, you use $4 

worth of supplies. You charge $25 per office. How many offices must you clean to break even?

Answer provided by our tutors

Let x = the number of offices


Total cost for x offices = 4x + 315


Total revenue for x offices = 25x


to break even Total cost = Total revenue


4x + 315 = 25x


by solving we find


x = 15 offices


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you must clean 15 offices to break even.