Question 788859
H = 100% pure alcohol
T = 30% alcohol
L =5% alcohol
M = 1425 mL of mixture or solution at the 30% alcohol content
u = mL of 5% to use (unknown)
v = mL of pure alcohol (unknown)


These equations are your system.
{{{(Lu+Hv)/M=T}}} and {{{u+v=M}}}
Solve the system for u and v.