Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 2 - Section 2.5 - An Introduction to Problem Solving - Exercise Set: 28

Answer

Greenberg hit 58. Ruth hit 60.

Work Step by Step

Let $x$ be the number hit by Greenberg. The number hit by Ruth is $x+2$. The sum of the page numbers is represented by the equation: $x+x+2=118$ Solve for x, the number hit by Greenberg. Combine like terms. $2x+2=118$ Use the addition property of equality to subtract 2 from each side of the equation. $2x+2-2=118-2$ Simplify. $2x=116$ Use the multiplication property of equality to divide both sides of the equation by 2. $2x\div2=116\div2$ Simplify. $x=58$ Find the number hit by Ruth. $x+2=58+2=60$
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