Algebra 1: Common Core (15th Edition)

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

Chapter 2 - Solving Equations - Common Core Cumulative Standards Review - Selected Response - Page 159: 3


$c=-1/7$ (B)

Work Step by Step

We first cancel out the -9c by adding 9c to both sides to get that $-21c-6=-3$. We need to get the c alone. Thus, we cancel out the subtraction by adding 6 on both sides. This leaves us with the equation $-21c=3$. In order to cancel out multiplication, we use division, so we divide both sides by $-21$ to get that $c=-1/7$.
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