Question 367647
let mysteries movies watched be x 
space adventures movies watched will be 2x 
..
mysteries = 2hours long
space adventures = 1.5 hours
..
2x+1.5*2x =15
2x+3x=15
5x=15
/5
x= 3 movies mysteries
6 movies space adventure
6*1.5 = 9 hours of space adventure
...
m.ananth@hotmail.ca