Question 503047
	--------percent	----------------	quantity									
Orange juice	20	----------------			20	gal						
Orange juice	80	----------------			x	gal						
Mixture	50	----------------	20	+	x	gal						
												
20	*	20	+	80	x	=	50	(	20	+	x	)
400	+	80	x	=	1000	+	50	x				
80	x	+	-50	x	=	1000	-	-400				
30	x	=	600									
/	30											
x	=	20										
		20	gal		of	80	%	Orange juice