Celano printing recently charged $.49 per page for color copies and nine cents per page for black-and-white copies. If Michaela’s bill for 90 copies was $12.90 how many copies of each type were made?
1 Answer
Feb 26, 2018
12 color copies and 78 black-and-white copies.
Explanation:
Let
Now, solve. I used substitution below.
equation 2
equation 1
equation 2
So, there were 12 color copies and 78 black-and-white copies.