Question

How many ounces of a 12​% alcohol solution must be mixed with 9 ounces of a ​20% alcohol solution to make a 16​% alcohol​ solution?

Answer 1

9 ounces

Explanation:

Let x = number of ounces of 12% solution.

0.12x + 0.2 × 9 = 0.16(x + 9)

0.12x + 1.8 = 0.16x + 1.44

-0.04x = -0.36

x = 9

Answer: 9 ounces