So i tried to work it out and this is what I got:
C6H12O6 + H2O + 2e- <=> C6H12O7 + 2H+
Fe(CN)64- <=> Fe(CN)63- + e-
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C6H12O6 + 2Fe(CN)64- + H2O <=> C6H12O7 + 2H+ + Fe(CN)63-
Is this correct?
Probably logical reasoning will help you...
Glucose is getting oxidized by ferricyanide ion to gluconic acid, and hence ferricyanide ion is being reduced to ferrocyanide ion.
Since oxidation is the loss of electrons, glucose has to lose electrons. Now see your first equation.
Since reduction is the gain of electrons, ferricyanide ion has to gain electrons. Now look at your 2nd equation...you might want to reverse it, because otherwise your final equation states that there is no reduction taking place, just oxidation. This is quite absurd, since reduction and oxidation are complementary processes. One cannot occur without the other
I hope this helps