12/V+12/(6-V)=8
12*(6-V)+12V=8*V*(6-V)
72-12V+12V=48V-8V²
72=48V-8V²
V²-6V+9=0
D=36-4*9=0
V=6/2=3
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12/V+12/(6-V)=8
12*(6-V)+12V=8*V*(6-V)
72-12V+12V=48V-8V²
72=48V-8V²
V²-6V+9=0
D=36-4*9=0
V=6/2=3