8 = 2(l + w)
l = 3w
Replace l in first equation with 3w.
8 = 2(3w + w)
Combine like terms.
8 = 2(4w)
Multiply.
8 = 8w
Divide both sides by 8.
w = 1
The width is equal to 1.
Replace the value of w with 1.
l = 3w
l = 3(1)
l = 3
The length is equal to 3.
