How many gallons of a 70% alcohol solution and a 40% alcohol solution must be mixed to get 15 gallons of a 52% alcohol solution?
70% solution: ___ gallons
40% solution: ___ gallons
+37146 15 gallons final soln 52%
x = amount of 70%
(15-x) = amount of 40%
amount of ingredients = amount in final soln
.70(x) + .40 (15-x) = .52(15) solve for 'x' the amount of 70% then 15% is 15-x
