The perimeter of a rectangular wooden deck is 90 feet. The deck's length, I, is 5 feet less than 4 times its width, w. Which System of linear equations can be used to determine the dimensions, n feet, of the wooden deck?
You are given the perimeter of the rectangular deck is
You are also given that the deck's length is
Those two equations are your system of linear equations. The second equation can be plugged into the first equation. This gives us an equation entirely in terms of
Combine your term's with
Divide both sides by
Now you can plug