The area of a rectangle is 60 in sq the length is 3 less than 3 times the width. What's the width of the rectangle

Question

The area of a rectangle is 60 in sq the length is 3 less than 3 times the width. What's the width of the rectangle

Answer 1

Let the width be x, then the length is 3x-3.

x(3x-3)=60

3x²-3x-60 =0

x²-x-20=0

(x-5)(x+4) =0

x=5 or -4(width can't be negative)

length =3x-3 =12

width = 5