Jose wants to put a fence around the dog run in his back yard in Chicago. Since one side is adjacent to the house, he will only need to fence three sides. There are two long sides and one shorter side parallel to the house, and he needs 142 feet of fencing to enclose the dog run.

The length of the long side is 4 feet less than two times the length of the short side.

Write an equation for
L
, the length of the long side, in terms of
S
, the length of the short side.