#### Answer

$2x - 30 = 50$

#### Work Step by Step

We can call our unknown number "$x$".
Twice a number can be written as $2x$.
So,
$$2x - 30 = 50$$

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Published by
Brooks Cole

ISBN 10:
1285199197

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

$2x - 30 = 50$

We can call our unknown number "$x$".
Twice a number can be written as $2x$.
So,
$$2x - 30 = 50$$

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