A rope 100 feet long is stretched around four posts set at the corners of a rectangle whose area is 576 square feet. Find the dimensions of the rectangle.
So we can say:
And simplify that to:
And let's rearrange that to:
Now let's go to the area (This is going to end up as a simul. equation)
Now let's substitute that value we have for the length
Solve for W, and subsequently L.