Question 405455
percent	----------------	quantity
10.00%	----------------	x
20.00%	----------------	20-x
13.00%	----------------	20		
...

10x+20(20-x)=13*20
												
10x+400	-20x=260		
10x-20x	=260-400		
-10x-=-140							
/-10										
x=14 liters=====> 10% solution
balance = 6 liters 20%