Question

Bruce wants to make 50 ml of an alcohol solution with a 12% concentration. He has a 10% alcohol solution and a

15% alcohol solution.
Which equation can Bruce use to determine how much of the 10% alcohol solution he should use?
0.10.x + 0.15(50 - x) = 50+ 0.12

Answer 1

0.1x+0.15(50-x)= 50*0.12

Explanation:

50 ml of 12% solution has 50*0.12 ml of alcohol

x ml of 10% solution has x*0.1 ml of alcohol

(50-x) ml of 15% solution has (50-x)*0.15 ml of alcohol

The equation to solve is:

• 0.1x+0.15(50-x)= 50*0.12