Question 297894
almost but need to reread the question
{{{P=2L+2W}}} know your formulas
"The perimeter is 36 meters" 
{{{P=36}}}
"the length is 4 meters more than the width"
{{{L=(W+4)}}}
______________
solve
{{{P=2L+2W}}}
{{{36=2(W+4)+2W}}}
{{{36=2W+8+2W}}}
{{{36=4W+8}}}
{{{28=4W}}}
{{{highlight(7)=W}}}
find length
{{{L=(W+4)}}}
{{{L=(7+4)}}}
{{{L=highlight(11)}}}
_____________________
Check
{{{P=2L+2W}}}
{{{36=2(11)+2(7)}}}
{{{36=22+14}}}
{{{36=36}}}
correct