Question 917248
Acid														
	percent	----------------			quantity									
Sulphuric acid type I	20.00%	----------------			x	ml								
sulphuric acid type II	50.00%	------	6	-	x	ml								
Mixture	30.00%	----------------	6											
Total	6		ml											
20.00%	x	+	50.00%	(	6	-	x	)	=	30.00%	*	6		
20	x	+	50	(	6	-	x	)	=	180				
20	x	+	300	-	50	x	=			180				
20	x	-	50	x			=	180	-	-300				
-30	x			=	-120									
/	-30													
	x			=	4		ml			20.00%		Sulphuric acid type I		
					2		ml			50.00%		sulphuric acid type II		
														
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