Question 403138
Bob has to mix a solution of .67 herbicide and .46 herbicide to form 42 liters of a .55 solution. How much .67 solution does Bob use?

percent	----------------	quantity
67.00%	----------------	x
46.00%	----------------	42-x
55.00%	----------------	42	(Mixture)
...

67x+46(42-x)=55*42
		
67x+1932-46x=2310		
									
21x=378							
/21											
x=18	liters of .67