Answered

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

Sagot :

eu99li

{5x-7y=-2

{-5x-10y=-15     (+)

5x-5x-7y-10y=-17

-17y=-17    /:(-17)

  y=1

5x-7 *1=-2

5x-7=-2    /+7

5x=5     /:5

x=1

Solution: (1; 1)   

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