The first reaction is actually two reactions:

$$\ce{4 XeF4 + 8 H2O → 2 Xe + 2 XeO3 +  16 HF + O2}$$

$$\ce{2 XeF4 + 4 H2O → 2 Xe + 8 HF + 2 O2}$$

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$$\ce{6 XeF4 + 12 H2O -> 4 Xe + 2 XeO3 +  24 HF + 3O2}$$