Mitiku D. answered 01/25/15
Tutor
4.9
(205)
Electrical Engineer, Patient and Objective
Hi Jill, U + U + 3 = 99 //U is how much mp3 you have U+3 is how much your friend has. Can you take it form here..... add the two Us together and subtract 3 from both sides. Good luck Jill.