SOLUTION: A book cost as much asa 3 pens.hamdan paid $56 for 3 books and 5 pens.what was the cost of 2books?

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Question 855157: A book cost as much asa 3 pens.hamdan paid $56 for 3 books and 5 pens.what was the cost of 2books?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
p price of 1 pen
b price of 1 book

One book is the price of three pens, so b=3p.

Hamden spent 3b%2B5p=56 dollars. Do the substitution:
3%283p%29%2B5p=56
9p%2B5p=56
14p=56
p=56%2F14=%287%2A8%29%2F%287%2A2%29
highlight%28p=4%29. One pen costs 4 dollars.
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b=3p=3%2A4=highlight%2812%29. One book costs 12 dollars.