Both Danny and Tpony have marbles. If Danny gave Tony 5 marbles, they would have the same number of marbles....

Both Danny and Tpony have marbles. If Danny gave Tony 5 marbles, they would have the same number of marbles. However, if Tony gave Danny 5 marbles, then Danny would have 5 times as many marbles as Tony would have. How many marbles do the two boys have together