SOLUTION: The textbook for a biology class costs $15 more than twice the cost of a used textbook for college algebra. If the cost of the two books together is $129,find the cost of the biolo
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Question 818317: The textbook for a biology class costs $15 more than twice the cost of a used textbook for college algebra. If the cost of the two books together is $129,find the cost of the biology book.
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
2x+15+x=129
3x=129-15
3x=114
x=114/3
x=$38 algebra
2x+15=$91 biology
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