Question 557442
Start with:
P = 2(L+W) as the formula for the perimeter, P, of a rectangle with length, L, and width, W.
P = 2(L+W) Substitute P = 1000 and L = 5W.
1000 = 2(5W+W) Simplify.
1000 = 2(6W)
1000 = 12W Divide both sides by 12.
{{{W = 83}}}{{{1/3}}} and...
{{{L = 5(83)}}}{{{1/3}}}
{{{L = 416}}}{{{2/3}}}