talonlewey talonlewey

19-11-2019
Mathematics

contestada

4x + 2y = 9
5y - 4x = 5

Respuesta :

mirjetamurselaj mirjetamurselaj

19-11-2019

we sum the both rows with 1×

4×+2y+5y-4x=9+5

7y=14

y=14/7

y=2

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