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When borax is heated and the CuSO4 is a...

When borax is heated and the `CuSO_4` is added, a blue mass 'P' is formed. When borax is heated in a charcoal cavity and `CuSO_4` added, a red and opaque 'Q' is formed. The oxidation states of the metal in P and Q are 'x' and 'y' respectively. Then x + y is
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