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: 15

Answer

The solution of this equation is x = 200

Work Step by Step

0.07x + 0.08(x + 600) = 78 Use the distributive property to obtain: 0.07x + 0.08x + 48 = 78 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 + 0.08x = 78 - 48 0.07x + 0.08x = 30 0.15x = 30 Divide both sides by 0.15: x = 200 The solution of this equation is x = 200
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