Question 285627
there are definetly similar problems to these in the rectangle section you should review that section before posting yours.
{{{P=2(L+W)}}}
{{{L=4W-9}}}
substitute and solve
{{{P=2(L+W)}}}
{{{52=2(4W-9+W)}}}add
{{{52=2(5W-9)}}}distribute
{{{52=(10W-18)}}}add
{{{52+18=(10W)}}}
{{{70=10W}}}divide
{{{highlight(7=W)}}}
{{{L=4W-9}}}
{{{L=4(7)-9}}}multiply
{{{L=28-9}}}subtract
{{{highlight(L=19)}}}