Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 7 - Algebraic Fractions - 7.5 - Fractional Equations and Problem Solving - Concept Quiz 7.5 - Page 305: 5


C, D

Work Step by Step

A is wrong because the numerator and the denominator on the right side of the equal sign are flipped. After all, the left side of the fraction involves the number of drinks over the price, so the right side should have 3, the number of drinks, over x, the price. B is also incorrect because 5.07 is over 8. If 5.07 were the cost of eight drinks, this would be correct, but it is the cost of 3 drinks, so 5.07 should be over 3.
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