The perimeter of a rectangle is 34 units its width is 6.5 units. Write an equation to determine the length (l) of the rectangle. Find the length of the rectangle.
If the width is w and the length is l, then 2w+2l=perimeter=34=2*6.5+2l=13+2l. Subtracting 13 from both sides, we get 21=2l and by dividing both sides by 2 we get 10.5
