Автор - wastad888

Решите уравнение:номер 6

Ответ

Автор - efeboxykz

103/12 - x : 20 = 7/40

103/240 - 1/20x=7/40

-1/20=7/40 - 103/240

-1/20x=42/240- 103/240

1/20x=61/240

x=61/120

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