Every day Ryan spends 8 hours on learning english, 50 hours on learning chinese and 40 hours on learning spanish. How many more hours does he spend on learning chinese than he does on learning spanish?
How many hours does he spend on learning english? 
How many hours does he spend on learning chinese? 
How many hours does he spend on learning spanish? 

8 hours on learning english, 50 hours on learning chinese and 40 hours on learning spanish. 

He spends 10 more hours on learning chinese than he does on learning spanish.