One side of a rectangle is 3 times the length of another side. The difference in their length is 12 feet. What is the rectangle's perimeter?

Answer 1

X = 3Y

X-Y = 12

3Y - y = 12

2y = 12

y=6

The two sides are 6 and 18

The perimeter is 24 + N where N is the measure of the third side not given