Пошаговое объяснение:
28/(х - 6) = 7/9
7*(х - 6) = 9 * 28
7х - 42 = 252
7х = 252 + 42
7х = 294
х = 294 : 7
х = 42
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Пошаговое объяснение:
28/(х - 6) = 7/9
7*(х - 6) = 9 * 28
7х - 42 = 252
7х = 252 + 42
7х = 294
х = 294 : 7
х = 42