To balance the equation, we need to ensure that the number of each type of atom is the same on both sides of the equation.

CS2(s) + 3O2(g) = CO2(g) + 2SO2(g)

Now the equation is balanced in terms of atoms:

2C = 2C
2S = 2S
6O = 2O + 4O

Finally, we need to balance the electrons by adding electrons to the side with the greater positive oxidation state:

CS2(s) + 3O2(g) + 8e- = CO2(g) + 2SO2(g)

Now the equation is balanced in terms of atoms and electrons.