Question 513644
	--------percent	----------------	quantity									
Tin I	70	----------------			70	Kgs						
Tin II	30	----------------			x	Kgs						
Mixture	50	----------------	70	+	x	Kgs						
												
70*70+30	x=	50	(	70	+	x	)
4900 +	30x	=	3500	+	50	x				
30	x	+	-50	x	=	3500	-	-4900				
-20	x	=	-1400									
/	-20											
x	=	70										
		70	Kgs		of	30	%	Tin II