SOLUTION: How many litres (L) of a 40% glycerine solution must be mixed with 10L of an 80% glycerine solution to obtain a 65% solution?

Question 816565: How many litres (L) of a 40% glycerine solution must be mixed with 10L of an 80% glycerine solution to obtain a 65% solution?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
This depends on the kind of percent concentration: either w/v or v/v.
This help will be according to percents as volume per volume.

u = how much 40%

Solve for u.

you can finish?
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