(25/32 + х) - 15/32 = 27/32
25/32 + х = 27/32 + 15/32
25/32 + х = 42/32
х = 42/32 - 25/32
х = 17/32
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Проверка: (25/32 + 17/32) - 15/32 = 27/32
42/32 - 15/32 = 27/32
27/32 = 27/32
(25/32 + х) - 15/32 = 27/32
25/32 + х = 27/32 + 15/32
25/32 + х = 42/32
х = 42/32 - 25/32
х = 17/32
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Проверка: (25/32 + 17/32) - 15/32 = 27/32
42/32 - 15/32 = 27/32
27/32 = 27/32