Problema Solution
The length of a rectangle is 4 cm more than twice its width. If the perimeter of the rectangle is 32 cm, find the length of the rectangle.
Answer provided by our tutors
l=4+2w , length given in terms of w
2w=l-4
p=32=2l+2w , perimeter is 32 but also equals 2l+2w
32=2l+2w
32=2l+l-4
32+4=3l
3l=36
l=36/3
l=12 , length is 12 cm