Question

The perimeter of a rectangular wooden deck is 90 feet the decks length l is 5 feet less than 4 times it's with, w. Find the length and width of the wooden deck

Answer 1

P=2(l)+2(w)

90=2(4w-5)+2(w)

90= (8w-10)+2w

90=10w-10

10+90=10w-10+10

100=10w

w=10

90=2(4[10]-5)+2(10)

90=2(40-5)+2(10)

90=2(35)+20

90=70+20

90=90