Автор - raushan210907

9-4у=-5у. 2) 4n=-2+6n

Ответ

Автор - dvt9x

1)

9-4у=-5у

9-4у+5у=0

4у-5у=9

у=-9

2)

4n=-2+6n

-2+6n-4n=0

2n=2+0

n=1

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