10 - 6 + х = 16, 30 - х + 20 = 50, 12 - 18 + у = 30, 8 - у + 7 = 15, 25 - 70 + х = 95, 13 - 47 + х = 60, 9 - у + 80 = 89, 15 - у + 15 = 30,

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