Question

The length of a certain rectangle is 4 meters more than three times its width. If the perimeter of the rectangle is 56 meters, then the width of the rectangle is

Answer 1

width ... x m
length ... 3x+4

solve 2(x + 3x+4) = 56

Answer 2

x+3x+4=56/2
4x+4=28
4x=28-4
4x=24
x=6

Answer 3

x+3x+4=56/2
4x+4=28
4x=28-4
4x=24
x=6
length=3x+4
=3x6+4
=18+4
=22