Prealgebra (7th Edition)

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

Chapter 3 - Review - Page 206: 70


The number is -16.

Work Step by Step

"Product" indicates multiplication. "Twice" is multiplication by 2. "Difference" indicates subtraction. Since the difference is a factor in the multiplication, the subtraction is done first so is written in parentheses. $3x=2(x-8)$ $\longrightarrow$distributive property $3x=2x-16$ $\longrightarrow$addition property $3x-2x=2x-16-2x$ $\longrightarrow$combine like terms $x=-16$
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