Calculating Total Marbles After Transaction

Maria has a collection of marbles. She has 50 red marbles, 35 blue marbles, and 25 green marbles. Maria's friend Jake asks her how many marbles she would have if he gave her 15 more red marbles and took away his 5 blue marbles. How many marbles would Maria have after this transaction?

To find the total number of marbles after the transaction, you need to consider the increases and decreases in each color of marbles.