Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 9 - Basic Algebra - 9.8 Using Equations to Solve Application Problems - 9.8 Exercises: 31

Answer

The number is $7$.

Work Step by Step

Let $x = $ the number $30 - 3x = 2 + x$ $30 - 2 = x + 3x$ $28 = 4x$ $4x = 28$ $x = \frac{28}{4}$ $x = 7$
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