Question 797976
Generalized:  How many liters of a H% acid solution must be mixed with a L% acid solution to get M liters of a T% acid solution?


Know that {{{L<T<H}}};
Let u = volume of L%, and v = volume of H%.  These are unknown variables.


{{{(Lu+Hv)/M=T}}} and {{{u+v=M}}}
Solve for u and v.