How many pairs of whole numbers have a sum of 99

Can someone me i’m confused. will give brainliest and a whole bunch of points

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?