Question 1045825
x for width
y for length
p for perimeter
{{{y=-3+x/3}}}


EQUATION FOR PERIMETER:
{{{p=2x+2y}}}


Make the substitution and simplify.
{{{p=2x+2(x/3-3)}}}
{{{p=2x+2(x/3-9/3)}}}
{{{p=2x+2(x-9)/3}}}
{{{p=2x(3/3)+2(x-9)/3}}}
{{{p=6x/3+(2x-18)/3}}}
{{{p=(6x+2x-18)/3}}}
{{{highlight(p=(8x-18)/3)}}}