Question 167365
P=2w+2l eq 1
l=2w-4  eq 2
:
substitute P=28 and l's value in eq 2 into eq 1--->28=2w+2(2w-4)
:
28=2w+4w-8----{{{6w=36}}} so {{{w=6}}}

{{{highlight(width=6feet)}}}
{{{highlight(length=2(6)-4=8feet)}}}