SOLUTION: Photocopying. Copy recently charged 49� per page for color copies and 7� per page for black-and-white copies. If Mikes bill for 90 copies was $11.34, how many copies of each type

Question 369460: Photocopying. Copy recently charged 49� per page for color copies and 7� per page for black-and-white copies. If Mikes bill for 90 copies was $11.34, how many copies of each type were made?
Answer by amoresroy(361) (Show Source): You can put this solution on YOUR website!
Photocopying. Copy recently charged 49� per page for color copies and 7� per page for black-and-white copies. If Mikes bill for 90 copies was $11.34, how many copies of each type were made?
Let c = no. of color copies
90-c = no. of black-and-white copies
.49c + .07(90-c) = 11.34
.49c + 6.3 - .07c = 11.34
.49c - .07c = 11.34 - 6.3
.42c = 5.04
c = 12
90-c = 78
There are 12 color copies and 78 black-and-white copies

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