Answer:
There are 6 carbons on LHS and 1 on RHS, 12 hydrogens on LHS and 2 on RHS
C6H12O6 + O2 = 6 CO2 + 6 H2O
Now there are 8 oxygens on LHS and 18 on RHS
C6H12O6 + 6O2 = 6CO2 + 6H2O