# Math

posted by Kate

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!!!!

1. Reiny

cost 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

2. Kate

Makes sense now - thanks Reiny!!!

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