Question 419086
percent	----------------	quantity
30	----------------	x
50	----------------	200-x
42.00%	----------------	200		
...............
30x+50(	200-x)=42*200
30x+10000-50x=8400	
30x-50x	=8400-10000		
-20x=-1600							
/20											
x=80 liters 30%							
50% ----120 liters