Question 921065
---	price	----------------	Amount									
coffee I	2	----------------			30	lbs						
coffee II	7	----------------			x	lbs						
Mixture	5	----------------	30	+	x	lbs						
												
2	*	30	+	7	x	=	5	(	30	+	x	)
60	+	7	x	=	150	+	5	x				
7	x		-5	x	=	-60	+	150				
2	x	=	90									
/	2											
x	=	45		lbs	coffee II							
												
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