Ответы на вопрос:
12x-x-55=011х = 55 х = 55: 11 х = 5 проверка 12*5-5-55 = 0 60-5-5 = 0 0 = 0 8x-5x-3=63х = 6+33х = 9х = 9: 3х = 3проверка8*3-5*3-3 = 624-15-3 = 66 = 62+6a+4a=9210а = 92-210а = 90а = 90: 10а = 9проверка2+6*9+4*9 = 922+54+36 = 9292 = 92
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