The perimeter of a rectangle is 118cm, and its length is 20cm more than its width?

The perimeter of a rectangle is 118cm, and its length is 20cm more than its width?

Let the rectangle be x in length and Y in width
Perimeter = 2x + 2Y = 118
Length more than width 20 = X-Y = 20
Namely
2x+2y=118
x-y=20