Question 558822
percent		----------------			quantity							
Alcohol type I	30	----------------			x	gallons						
alcohol type II	75	----------------	3	-	x	gallons						
Mixture	45.00%	----------------	3									
												
30x+75(3-x)=45*	3
												
30x+225	-75x=135		
30x-75x	=135-225		
-45x=-90							
/	-45											
x	=2		gallons			30.00%		Alcohol type I
1		gallons			75.00%		alcohol type II