Answer
$ x\gt 31$
Work Step by Step
We solve the inequality for $x$:
$\frac{9+x}{4}\gt10$
$$
9+x\gt 40\Longrightarrow x\gt 40-9\Longrightarrow x\gt 31
.$$
See the figure below.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Appendix C - Simple Inequalities - Exercise - Page 583: 47
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