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: 20

Answer

$5(x+2)=8x-11$ $x=7$

Work Step by Step

"Times indicates multiplication, "Sum" indicates addition. The term preceding "less than" is the subtrahend". $5(x+2)=8x-11$ $\longrightarrow$distributive property $5x+10=8x-11$ $\longrightarrow$addition property $5x+10-5x+11=8x-11-5x+11$ $\longrightarrow$simplify $21=3x$ $\longrightarrow$multiplication property $21\div3=3x\div3$ $\longrightarrow$simplify $7=x$
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