Question 490143
	percent	----------------	quantity									
Antifreeze I	25	----------------			90	gallons						
Antifreeze II	70	----------------			x	gallons						
Mixture	60	----------------	90	+	x	gallons						
												
25	*	90	+	70	x	=60(90+	x	)
2250	+	70	x	=	5400	+	60	x				
70	x	+	-60	x	=	5400	-2250				
10	x	=	3150									
/	10											
x	=	315										
		315	gallons		of	70	%	Antifreeze II