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Ответ

Ответ дан
Galina1013

Ответ:


Пошаговое объяснение:

300-х=42*2+50

300-х=84+50

300-х=134

-х=134-300

-х=-166

х=166

проверка 300-166=42*2+50

                  134=134

Ответ

Ответ дан
masha00131
300-х=84+50
300-х=134
-х=-300+134
-х=-186
х=186

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