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Posted by **Kate** on Monday, December 19, 2011 at 8:32pm.

Copies at the local library cost $.15 easch. A new copier costs $200 and it costs $.02 to make a copy. How many copies would have to be made for the cost of making your own copies equal to the cost of copying at the library?

Thank you!!!!

- Math -
**Reiny**, Monday, December 19, 2011 at 8:36pmcost to make n copies at library = .15n

cost to make n copies on your own = 200 + .02n

.15n = 200 + .02n

times 100

15n = 20000+2n

13n = 20000

n = 1538 copies

- Math -
**Kate**, Monday, December 19, 2011 at 8:49pmMakes sense now - thanks Reiny!!!

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