#### Answer

$$30 - 2x = 4$$

#### Work Step by Step

We can call our unknown number "$x$".
Twice a number can be written as "$2x$"
So,
$30-2x=4$

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Published by
Brooks Cole

ISBN 10:
1285199197

ISBN 13:
978-1-28519-919-1

$$30 - 2x = 4$$

We can call our unknown number "$x$".
Twice a number can be written as "$2x$"
So,
$30-2x=4$

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