Question 665761
-------------- 	percent	----------------	Amount									
Alcohol I	72	----------------			25	liters						
Alcohol II	80	----------------			x	liters						
Mixture	75	----------------	25	+	x	liters						
												
72*25+80x=75(25	+x)
1800+80x=1875+75x				
80x-75x	=-1800+1875				
5	x	=	75									
/	5											
x	=	15		liters	Alcohol II							
												
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