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1 - 8х / 15 = 4х / 9
4х / 9 + 8х / 15 = 1
20х / 45 + 24х / 45 = 1
44х / 45 = 1
44х = 1 × 45
44х = 45
х = 45/44 = 1 1/44
Ответ : 1 1/44.