## Basic College Mathematics (9th Edition)

The longer length of the wire is $19$ ft and the shorter length of the wire is $12$ ft.
Let $x =$ the longer length of the wire $(x) + (x - 7) = 31$ $2x - 7 = 31$ $2x = 38$ $x = \frac{38}{2}$ $x = 19$ ft Let $y =$ the shorter length of the wire $y = (x - 7)$ $y = 19 - 7$ $y = 12$ ft