Question

The length of a rectangle is 3inches more than its width if the perimeter is 42inches find the dimensions of the rectangle

Answer 1

Let w+3 = length of rectangle
Let w = width of rectangle

42=2(w)+2(w+3)
42=2w+2w+6
42=4w+6
36=4w
9=w

9+3=12

The length is 12inches and the width is 9 inches