Answer
$\dfrac{a+7}{7}$
Work Step by Step
If $a=2$, then the expression $
\dfrac{a+7}{7}
$ evaluates to
\begin{array}{l}\require{cancel}
\dfrac{2+7}{7}
\\\\=
\dfrac{9}{7}
.\end{array}
Hence, $
a
\ne
\dfrac{a+7}{7}
$.
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 4 - Polynomials - 4.1 Exponents and Their Properties - 4.1 Exercise Set - Page 237: 104
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