a chemist wants to mix a 22 acid solution with a 46% acid solution to get 32 gallons of 37% acid solution. How many gallons of the 22% acid solution and how many gallons of the 46% acid solution should be mixed?

Answer 1

just add up all the acid:

.22x + .46(32-x) = .37*32

Answer 2

A chemist needs to mix up 80 gallons of a 60% acid solution. She only has 45% and 70% solutions on hand.
How many gallons of each should she mix together?