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11-03-2021
Mathematics

contestada

x + 5y =20
2x - 7y = 9

Respuesta :

11-03-2021

Answer:

Step-by-step explanation:

will multiply the first equation with -2

-2x-10y=-40

i will add it now to the second equation

-2x-10y=-40

2x-7y=9

-17y=-31

y=31/17

and x=185/17

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