DAY 248

If I give you 5 marbles, I'll have as many as you. If you give me 5 marbles, I'll have twice as many as you. How many marbles do we each have?

Answer:

I have 35 and you have 25.............If giving you 5 marbles will make us equal, I must have 10 more than you. If X = the number of marbles I have, you have X - 10 marbles. If you give me 5 marbles, I will have 5 more and you will have 5 less: X + 5 = 2(X - 15).