Question 669862
-------------- 	percent	----------------	Amount									
Acid solution I	19	----------------			40	gallons						
Acid solution II	50	----------------			x	gallons						
Mixture	40	----------------	40	+	x	gallons						
												
19*40+50x=40(40	+x)
760+50	x	=	1600	+	40	x				
50x-40	x=-760+	1600				
10	x	=	840									
/	10											
x	=	84		gallons	Acid solution II							
												
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