Question 1051650
A rectangle has a perimeter of,
{{{P=2L+2W}}}
{{{2L+2W=320}}}
{{{L+W=160}}}
and
{{{L=3W+20}}}
Substituting,
{{{3W+20+W=160}}}
{{{4W=140}}}
{{{W=35}}}{{{yds}}}
and
{{{L+35=160}}}
{{{L=125}}}{{{yds}}}