## Prealgebra (7th Edition)

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 $v=42$ $2v=2\times42=84$