Question 1056235
The area of a rectangle is,
{{{A=L*W=63}}}
and
{{{W=L-2}}}
Substituting,
{{{L(L-2)=63}}}
{{{L^2-2L-63=0}}}
{{{(L-9)(L+7)=0}}}
Only one solution is positive,
{{{L-9=0}}}
{{{L=9}}}{{{ft}}}
So then,
{{{W=9-2}}}
{{{W=7}}}{{{ft}}}