Solve the Problem $70 \mathrm{~m}$ If the Length Is $7 \mathrm{~m}$ More Than the Width

Multiple Choice

Solve the problem.
-Find the length of a rectangular lot with a perimeter of $70 \mathrm{~m}$ if the length is $7 \mathrm{~m}$ more than the width.

A) $14 \mathrm{~m}$
B) $42 \mathrm{~m}$
C) $35 \mathrm{~m}$
D) $21 \mathrm{~m}$