This Day Last Year

May 9

Ernie and Irene are getting ready for a friendly water balloon fight when Ernie protests "Wait, it's not fair, you have three times as many balloons as I do!" Ernie, being a good sport, gives Irene 10 of his balloons. "It's still not fair" Irene says, "you still have twice as many balloons as I do!" How many balloons each kid had initially?