available you have vodka which is 40 alcohol by volume and w

available, you have vodka, which is 40% alcohol (by volume), and wine, which is 12% alcohol (by volume). you need to mix some of each to get S liters a mixture that is 15% alcohol. how much of each must you mix? define unknowns and set up as a system of 2 equations in 2 unknowns

Solution

Let W : amount of wine

V : Amount of vodka

0.12W + 0.4V = S

0.15(V +W) = S