Question 1186419
{{{P=2W+2L}}} perimeter formula
{{{W=L-0.4}}}
{{{P=53.2}}}
Substitute and solve in the perimeter equation
{{{53.2=2(L-0.4)+2L}}} multiply in parentheses
{{{53.2=2L-0.8+2L}}} add like terms
{{{53.2=4L-0.8}}} add 0.8 to both sides
{{{54=4L}}} divide by 4
{{{highlight(13.5=L)}}}
{{{13.5-0.4=W}}}
{{{highlight(13.1=W)}}}