Question 279351
p=46
l=8+4w
p=2l+2w
substitute and solve
{{{p=2l+2w}}}
{{{46=2(8+4w)+2w}}}
{{{46=16+8w+2w}}}
{{{46=16+10w}}}
{{{30=10w}}}
{{{highlight(3=w)}}}
l=8+4w
{{{l=8+4(3)}}}
{{{l=8+12}}}
{{{highlight(l=20)}}}