Найди корень уравнения, не выполняя вычислений:
а) 3012 • 9 + х = 3012 • 10, х =____
б) 50036 • 11 - а = 50036 • 9 + 50036, х =____
в) 48048 : 48 - х = 48000 : 48, х =___
г) 504325 + 200 = 504000 + х + 25, х =___
д) 707070 - 7000 = х + 70, х =___
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