Question 275795
Beth wants to make 11.6 fl. oz. of a 45% acid solution by mixing together a 22% acid 
solution and a 80% acid solution. How much of each solution must she use?
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Make M fl. oz. of a T% acid solution by mixing together a L% acid 
solution and a H% acid solution. How much of each solution to use?
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Use an unknown v fl. oz. of the H% solution and M-v fl. oz. of the L% solution.


{{{highlight_green(Hv+L(M-v)=TM)}}}


{{{Hv+LM-Lv=TM}}}

{{{(H-L)v=TM-LM}}}

{{{highlight(v=M((T-L)/(H-L)))}}}

Plug in the given values when you are ready and compute.