Автор - nemzenko4731

(4 1/9-а)+8 5/9=9 2/9

Ответ

Автор - Vladkruto
(4.1/9-a)+8.5/9=9.2/9
4.1/9-a+8.5/9=9.2/9
-a=9.2/9-4.1/9-8.5/9
-a=5.1/9-8.5/9
-a=-2.10-5/9
-a=-2.5/9
a=2.5/9
Ответ: 2.5/9

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