Question 907987
x is width, unknown.
y is length, unknown.
p is perimeter, known.
y=3x, from description.

Find x, the width.


{{{2x+2y=p}}}
{{{2x+2(3x)=p}}}
{{{2x+6x=p}}}
{{{8x=p}}}
{{{highlight(x=p/8)}}}