Question 589630
-------------- 	percent	----------------	Amount								
Chemical I	7.8	----------------	50	gallons					
Chemical II	2.2	----------------	x	gallons					
Total	4.2	----------------	50+xgallons					
											
7.8*50+2.2x=4.2(50+x)
390+2.2x	=210+4.2	x			
2.2x	-4.2x=-390+210		
-2x=-180								
/	-2										
x=90	gallons	Chemical II						
90	gallons	Chemical I						
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