SOLUTION: I want to mix 5 oz of a 6% solution of red coloring with a 15% solution of red coloring to get a mix of 8% red coloring. How much of the 15% solution do I need?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: I want to mix 5 oz of a 6% solution of red coloring with a 15% solution of red coloring to get a mix of 8% red coloring. How much of the 15% solution do I need?      Log On

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Question 809575: I want to mix 5 oz of a 6% solution of red coloring with a 15% solution of red coloring to get a mix of 8% red coloring. How much of the 15% solution do I need?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
You are looking for something like this:

u = ounces of the 15% material.
%285%2A6%2Bu%2A15%29%2F%28u%2B5%29=8