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skad [1K]
3 years ago
7

5x-7y=-2 -5x-10y=-15

Mathematics
1 answer:
seraphim [82]3 years ago
8 0

{5x-7y=-2

<u>{-5x-10y=-15     </u>(+)

<em>5x-5x-7y-10y=-17</em>

<em> </em>-17y=-17    /:(-17)

  y=1

<em /><em>5x-7 *1=-2</em>

<em />5x-7=-2    /+7

5x=5     /:5

x=1

<u>Solution:</u> (1; 1)   

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