Kelly has 8 nintendo games. She found 50 more nintendo games. How many does she need to give away so that she will have 29 games left?
Kelly has 8 games. 
She finds 50 more games. 
That means she has 58 games in total. 
She wants to have 29 games left. 

So we need to find out how many games she needs to give away. 

58 - 29 = 29 

So she needs to give away 29 games.