Question

If a rectangle has a length that is three times the width increased by 4. Find the dimensions of both the length and width if the

perimeter of the rectangle is 80 centimeters

Answer 1

width is 9

length is 13

Explanation:

l=3b +4

w=b

(3b+4)2+2b=80

6b+8+2b=80

8b+8=80

8b=80-8=72

b=72/8

b=9