Срочно нужно решение!

Question

Срочно нужно решение!

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Answer 1

Ответ:

1)x-7y=0

12x+y=17

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x = 7y

12x+y = 17

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x = 7y

85y = 17

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x=7y

y = 0,2

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x = 1.4

y = 0.2

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2) 2x+3y=-1

3x+5y=-2

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2x = -1-3y

3x+5y= -2

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x= -1.5y-1

3x+5y=-2

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x=1.5y-1

-4.5y-3+5y =-2

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x=1.5y-1

0.5y = 1

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x=2

y=2

3) хз