Each girl will get 4 cookies and there will be 16 left over.
the student has left 75 because if you add 5 and 70 it gives you $75 that's how much the student had left.
X = short section of rope
4x = longer section of rope
x + 4x = 25
5x = 25
x = 5
…or in other words the shorter piece of rope is 5 feet long
