brivney
Jan 23, 2007, 12:21 PM
How do I make 20 volume peroxide out of 10 volume and 40 volume?
Capuchin
Jan 23, 2007, 12:40 PM
here you need to solve this equation:
10x + 40(1-x) = 20
where x is between 0 and 1
this will give x as the fraction of 1 whole volume of 10 volume peroxide.
start by expanding the brackets, then it should be easy algebra.
Good luck!