The width of a rectangle is 4 inches less than the length, the perimeter is 48, what is the dimensions?

Answer: 10 inches * 14 inches

Work:

length = x inches

width = x - 4 inches

perimeter = 2 (l+w)

48 = 2[ (x) + (x - 4) ]

48 = 2 (2x - 4)

24 = 2x - 4

28 = 2x

14 = x

length = x inches = 14 inches

width = x - 4 inches = 14 - 4 = 10 inches

Length is 14 inches, width is 10 inches.

If you need area, it's 140 inches.

2L + 2w = 48

L = w + 4

2 (w+4) + 2w = 48

2w + 8 + 2w = 48

4w + 8 = 48

4w = 40

w = 10

L = w + 4

L = 10 + 4

L = 14