Question 572259
"A rectangles's length is 8 meters more than three times the width" ___ L = 3W + 8


"The perimeter is 80 meters" ___ 2L + 2W = 80 ___ L + W = 40 ___ W = 40 - L


substituting ___ L = 3(40 - L) + 8 ___ L = 120 - 3L + 8 ___ 4L = 128