Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 3 - Section 3.4 - Linear Equations in One Variable and Problem Solving - Exercise Set - Page 195: 17


$30-x=3(x+6)$ $x=3$

Work Step by Step

$30-x=3(x+6)$ $\longrightarrow$distributive property $30-x=3x+18$ $\longrightarrow$addition property $30-x-18+x=3x+18-18+x$ $\longrightarrow$simplify $12=4x$ $\longrightarrow$multiplication property $12\div4=4x\div4$ $\longrightarrow$simplify $3=x$
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