Answer
$r=p-2q$
Work Step by Step
Using the properties of equality, in terms of $r,$ the given equation is equivalent to
\begin{array}{l}\require{cancel}
q=\dfrac{p-r}{2}
\\\\
2(q)=2\left(\dfrac{p-r}{2}\right)
\\\\
2q=p-r
\\\\
r=p-2q
.\end{array}
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 R - Elementary Algebra Review - R.2 Equations, Inequalities, and Problem Solving - R.2 Exercise Set - Page 947: 36
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