The length of a rectangle is 4 more than 3 times the width. if the perimeter is 104 meters, what is the width of the rectangle?

Lets x is width
length is 4 more than 3 times the width = 3x + 4

2x + 2(3x + 4) = 104
2x + 6x + 8 = 104
8x = 104 -8 
8x = 96
x = 96/8
x = 12

 the width of the rectangle is 12 meters

Think of it as five or above give it a shove. change the 5 or above to the right to a zero and add one to the number on the left.