Question 603183
-------------- 	percent	----------------	Amount								
Acid solution	20	----------------			100	ml					
Pure acid	100	----------------			x	ml					
Mixture	60	----------------	100	+	x	ml					
											
20*100	+100x	=60(100	+x)
2000+	100x=6000+60x			
100x-60x=-2000+	6000			
40	x	=	4000								
/	40										
x	=	100		ml	Pure acid						
											
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