Question 1157806
L = 40
H = 65
T = 50
M = 30
v, volume of the H %, the 65% alcohol
M-v, volume of the L % alcohol


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

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Solve for v.

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