Предмет: Математика, автор: gleb3a

1400/d-29=41

Ответы

Автор ответа: sweetlana1

1400/d-29=41

1400/d=41+29

1400/d=70

d=1400/70

d=20

Ответ: 20

Автор ответа: Romja

1400/d-29=41

1) $frac{1400}{d}-29-41=0$

2) $frac{1400}{d}-70=0$

3) $frac{1400-70d}{d}=0| *dneq0$

4)1400-70d=0 => d=20

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