Question 553609
percent		----------------quantity								
Acid type I	20	----------------x	liters							
Acid type II	70	----------------4-x	liters							
Mixture	55.00%	----------------	4										
													
20x+70(4-x)=55*4	
													
20x+280-70x=220	
20x-70x=220-280			
-50x=-60								
/-50												
x=1.2	liters	20.00%		Acid type I	
2.8		liters			70.00%		Acid type II