Предмет: Математика, автор: polanika8

5-y/4=3/7 помогите, пожалуйста​

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polanika8: да
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Автор ответа: azypoma942
0

Пошаговое объяснение:

7*(5-y)=4*3

35-7y=12

7y=35-12

7y=23

y=23:7

y=3 2/7

Автор ответа: WednesAddams
0

\displaystyle \frac{5-y}{4}=\frac{3}{7}\\\\ 7(5-y)=12\\35-7y=12\\-7y=12-35\\-7y=-23\\\\ y= \frac{23}{7}=3\frac{2}{7}

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