Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-2 Solving Two-Step Equations - Practice and Problem-Solving Exercises - Page 92: 53



Work Step by Step

Part A $2x-1 = 7$ We should add 1 to both sides. $2x = 8$ We should divide both sides by 2. $x = 4$. 4 is the answer. Part B. We could also take another approach. We could subtract both sides by 7. $2x - 8 = 0$ Then we could subtract both sides by 2x. $-8 =-2x$ Then we would divide both sides by -2. $4 = x$. 4 is the answer. Part C The method in part A is clearly easier; there are fewer steps.
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