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

Question 104816This question is from textbook Pretice hall mathematics. Algebra 1
: Suppose you are starting an office-cleaning service. You have spent $315 on equiptment. To clean an office, you use $4 worth of supplies. You charge $25 per office. How many offices must you clean to break even?
K what you do is write a linear equation for the problem and then you solve..but i have no idea. please help!! This question is from textbook Pretice hall mathematics. Algebra 1

Answer by cheesey(22) (Show Source): You can put this solution on YOUR website!
Establish a variable to represent number of offices cleaned. Let x = number of offices cleaned, then to determine your break even point you must use an inequality. If I'm reading the problem correctly you earn $25 for each office cleaned but you spend $4 to clean each office, therefore your net is $21 per office.
21x >=$315
x>= 315 / 21 => gives you the minimum number of offices to clean.
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