Prealgebra (7th Edition)

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

Chapter 3 - Review - Page 206: 72


He has 84 DVDs.

Work Step by Step

If $v$ is the number of movies on videotape, $2v$ is the number of movies on DVD. $v+2v=126$ $\longrightarrow$combine like terms $3v=126$multiplication property $3v\div3=126\div3$ $\longrightarrow$simplify $v=42$ $2v=2\times42=84$
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