Question 721041
Choose variables for everything:
u = volume of the lower concentration material
v = volume of the higher concentration material
T = concentration of solution you want to make, 9%
U = lower concentration available materail, 5%
V = higher concentration available material, 10%
M = volume of resulting solution to make, 50 ml.


Write your equations:
{{{highlight((uU+vV)/M=T)}}} and {{{highlight(u+v=M)}}}


Solve the System:
Solve the system for the unknowns, u and v.
Sometimes, exercises are assigned given values in a way to make solution process and computations easy or easier.