kenadyc kenadyc
  • 12-11-2020
  • Mathematics
contestada

x+2y-z = 9
-2x+y+z= 1
2x-y+2z= -5

Respuesta :

mayaasarp
mayaasarp mayaasarp
  • 12-11-2020

Answer:

I don't understand the first one

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