Answer
$ x\geq 20$
Work Step by Step
By adding $12$ to both sides of the inequality $x-12\geq 8$, we have
$$
x-12\geq 8 \Longrightarrow x\geq 20
.$$
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 582: 31
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