Question

A lab technician mixed a 660 ml solution of water and alcohol. if 3% of the solution is alcohol, how many milliliters of alcohol were used and how many milliliters of water were used?

Answer 1

Well, let's say x is the ml of water and y the ml of alcohol. Then you know that,
\[x+y=660\] ok?

Answer 2

yes i get it so far

Answer 3

Ok, then the problem says 3% of the 660 ml are alcohol. So, what is the 3% of 660?

Answer 4

19.8

Answer 5

Then you know that.
\[y=19.8\]

Answer 6

What is the value of x?

Answer 7

640.2

Answer 8

Perfect.

Answer 9

You know the ml of water, 640.2, and the ml of alcohol, 19.8. This is your solution.

Answer 10

Ok?

Answer 11

yes