Автор - diluracom

2 целых 1/14-1 целых 2/3х=1 целых 5/21

Ответ

Автор - ptanyavamp
2 1/14-1 2/3х=1 5/21
-1 2/3х=2 1/14-1 5/21
х=5/6:(-1 2/3)
х=- 1/2

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