Question

2x + y = 4
-4x - 2y= -8
sistema linear

Answer 1

Resposta:

2x+y=4(×-2)

-4x-2y= -8

-4x-2y= -8

4x-2y=-8

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-4y= -16

y= -16/-4

y= 4

2x+y= 4

2x+4=4

2x= 4-4

2x= 0

x= 0/2

x= 0