Question 808557
---	percent	----------------	Amount									
acid I	30	----------------			5	quarts						
Pure acid	100	----------------			x	quarts						
Mixture	50	----------------	5	+	x	quarts						
												
30	*	5	+	100	x	=	50	(	5	+	x	)
150	+	100	x	=	250	+	50	x				
100	x		-50	x	=	-150	+	250				
50	x	=	100									
/	50											
x	=	2		quarts	Pure acid							
												
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