Prealgebra (7th Edition)

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

Chapter 3 - Section 3.3 - Solving Linear Equations in One Variable - Exercise Set - Page 188: 9

Answer

$x=-9$

Work Step by Step

$x+20+2x=-10-2x-15$ $\longrightarrow$ simplify $3x+20=-25-2x$ $\longrightarrow$ addition property $3x+20-20+2x=-25-2x-20+2x$ $\longrightarrow$simplify $5x=-45$\multiplication property $5x\div5=-45\div 5$ $\longrightarrow$simplify $x=-9$
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