Question 559380
you have 60% solution
you have to add 100% antifreeze to get 80% solution
so we find out how much antifreeze is required to raise ti 80%
This quantity is to be replaced

percent		----------------		quantity								
Antifreeze	100	----------------x	quarts							
solution	60	----------------5-x	quarts							
Mixture	80.00%	----------------	5										
													
100x+60(5-x)=80*5	
													
100x+300-60x=400			
100x-60	x=400-300			
40x=	100								
/	40												
x=2.5	quarts			100.00%		Antifreeze	
2.5		quarts		60.00%		solution

2.5 quarts has to be removed	
m.ananth@hotmail.ca