The perimeter is 2 times the length plus 2 times the width: P = 2L + 2W
We are given the length, 14m; 2 times that is 28m
Plug in the values we know: 104m = 28m + 2W
Subtract 28m from boths sides of the equation: 104m - 28m = 2W = 76m
Divide both sides of the equation by 2: W = 76m / 2 = 38m
The width is 38m and the length is stated to be 14m
Verify: 14m + 14m + 38m + 38m = 104m