Решение:
1 - х = 3/7
-х = 3/7 - 1
-х = -4/7
х = 4/7
Ответ: х = 4/7.
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Решение:
1 - х = 3/7
-х = 3/7 - 1
-х = -4/7
х = 4/7
Ответ: х = 4/7.