Question 424843
	percent	----------------	quantity		
Alcohol	80	----------------	70
Alcohol	10	----------------	x
Total	20	----------------	70+x
....
80*70+10	*x=20(70	+x)
5600+10x	=1400+20	x					
10x-20x=	1400-5600					
-10x=-4200								
/-10									
x=420 liters 10% Alcohol