Question

{2x_5y=11 _6x+7y=_9
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Answer 1

Respuesta:

2x-5y=11 multiplicamos por 3

-6×+7y=-9

6×-15y = 33

-6×+7y = -9 eliminamos "x"

__________

-8y= 24

y= 24/-8

y= -3

reemplazamos "y" en ec 1

2x-5y=11

2× -5(-3)=11

2× +15 =11

2×=11-15

2× = -4

x=- 4/2

×=-2