Question

Suppose you are starting an office cleaning service. You have spent $315 on equipment. To clean the office you use $4 worth of supplies. You charge $25. How many offices must you clean to break even?

Answer 1

15 rooms. Look at the work below that i'll post.

Answer 2

(25-4)x=315
21x=315

Answer 3

x=15

Answer 4

So you must clean 15 rooms to break even.

Answer 5

My equations are y=4x + 315 and y=25x. Why did you do (25-4)?

Answer 6

oh wait.... nevermind. you set them equal to each other.