SOLUTION: suppose you are starting an office cleaning service. You have spent $315 on equipment. To clean an office, you use $4 worth of supplies you. You charge 25$ per office. How many off

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: suppose you are starting an office cleaning service. You have spent $315 on equipment. To clean an office, you use $4 worth of supplies you. You charge 25$ per office. How many off      Log On


   

Question 401128: suppose you are starting an office cleaning service. You have spent $315 on equipment. To clean an office, you use $4 worth of supplies you. You charge 25$ per office. How many offices must you clean to break even
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
suppose you are starting an office cleaning service. You have spent $315 on equipment. To clean an office, you use $4 worth of supplies you. You charge 25$ per office. How many offices must you clean to break even
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E(x) = 315+4x where x is the number of offices you clean and E is expense.
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R(x) = 25x
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Equation:
Solve E(x) = R(x)
315+4x = 25x
21x = 315
x = 15 offices
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Cheers,
Stan H.