Предмет: Алгебра, автор: Аноним

решите систему уравнением способом сложения

3х+4у=14

5х+2у=14

Ответы

Автор ответа: AlinochkaMalinochka
0

умножаем 2ое на 2

1ое переписываем

3х+4у=14

10х+4у=28

вычитаем из 1 второе( вычитание тоже относится к способу сложение)

3х-10х=-14

-7х=-14

х=-14:(-7)

х=2

 

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B

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