Ответы на вопрос:
15/22 - (4 - 1 5/6) : х = 1 5/33, 15/22 - (24/6 - 11/6) : х = 38/33, 15/22 - 13/6 : х = 38/33, 13/6 : х = 15/22 - 38/33, 13/6 : х = 45/66 - 76/66, 13/6 : х = - 31/66, х = 13/6 : (-31/66), х = -13/6 * 66/31, х = -143/31, х = -4 19/31,(1 3/4 - 1 19/48) * х = 1 2/3 - 3 5/7, (7/4 - 67/48) * х = 5/3 - 26/7, (84/48 - 67/48) * х = 35/21 - 78/21, 17/48 * х = -43/21, х = -43/21 : 17/48, х = -43/21 * 48/17, х = -2064/357, х = -5 279/357
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