Answer
$x=0.3$
Work Step by Step
$x+3.9=4.2\rightarrow$ subtract 3.9 from both sides
$x+3.9-3.9=4.2-3.9\rightarrow$ simplify
$x=0.3$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 5 - Review - Page 402: 77
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