Answer
$$2(x-6)=30$$
Work Step by Step
We can call our unknown number "$x$".
The difference between a number and 6 can be written as $x-6$ and doubling that would give $2(x-6)$.
(Remember to add the parenthesis.)
So,
$2(x-6)=30$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 6 - Section 6.5 - Translating Words into Algebraic Symbols - Exercises - Page 248: 20
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