Question 1142452
H=45
L=30
T=39
M=30
v, unknown amount for H
M-v, unknown amount for L


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

Solve for v.


{{{LM-Lv+Hv=TM}}}
{{{(H-L)v+LM=TM}}}
{{{(H-L)v=TM-LM}}}

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


Substitute given values and use found v to evaluate M-v.