Prealgebra (7th Edition)

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

Chapter 5 - Review - Page 402: 77



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 $x=0.3$
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