Question 866617
---	percent	----------------	Amount								
Solution 	30	----------------			2	liters					
water	0	----------------			x	liters					
Mixture	20	----------------	2	+	x	liters					
											
30	*	2	+	0	x	=	20	(	2	+	x
60	+	0	x	=	40	+	20	x			
0	x		-20	x	=	-60	+	40			
-20	x	=	-20								
/	-20										
x	=	1		liter	water						
											
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