Question 573496
percent		----------------quantity								
Alcohol type I	20.00%	----------------x	cups							
Alcohol type II	15.00%	------	8-x cups							
Mixture	18.00%	----------------	8										
													
20.00%x+15.00%(8-x)=	18.00%	*	8	
20x+15(	8-x)=144			
20x+120	-15x=144			
20x-15x=144-120			
5	x			=	24								
/	5												
x=	4.8		cups			20.00%		Alcohol type I	
	3.2		cups			15.00%		Alcohol type II	
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