Elementary Algebra

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

Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.3 - More on Percents and Problem Solving - Problem Set 4.3: 20

Answer

The solution of this equation is x = 800.

Work Step by Step

0.07x +0.09(2000 - x) = 164 Use the distributive property to obtain: 0.07x + 180 - 0.09x = 164 In order to solve for x, we first need to get all of the terms with an x in them on the same side of the equation: Thus, we obtain: 0.07x - 0.09x = 164 - 180 -0.02x = -16 Divide both sides by -0.02: x = 800 The solution of this equation is x = 800.
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