Question 335472
For a rectangle,
{{{P=2L+2W}}}
{{{W=L-12}}}
{{{P1=2L+2(L-12)}}}
{{{P1=2L+2L-24}}}
{{{P1=4L-24}}}
.
.
.
{{{P2=4(L+30)-24}}}
{{{P2=4L+120-24}}}
{{{P2=4L+96}}}
.
.
.
{{{P2=2*P1}}}
{{{4L+96=2(4L-24)}}}
{{{4L+96=8L-48}}}
{{{-4L=-144}}}
{{{highlight(L=36)}}}
{{{W=36-12}}}
{{{highlight(W=24)}}}
.
.
.
The original rectangle is 24 x 36.