Tripling the greater of two consecutive even integers gives the same result as subtracting 10 from the lesser even integer. what are the integers? it's participation so i just have to have an answer, it doesn't have to be right. read comments for solution.

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?