Answer
Choice C
Work Step by Step
To solve $
3x-1=7
,$ add $1$ first to both sides to give
\begin{array}{l}\require{cancel}
3x-1+1=7+1
\\\\
3x=7+1
.\end{array}
Hence, $\text{
Choice C
.}$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 2 - Equations, Inequalities, and Problem Solving - 2.2 Using the Principles Together - 2.2 Exercise Set - Page 94: 7
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