dustyakers111 dustyakers111
  • 27-01-2021
  • Mathematics
contestada

use substitution X+y=11 -x=-y-9​

Respuesta :

ayaelsheikh2005
ayaelsheikh2005 ayaelsheikh2005
  • 27-01-2021

Answer:

-(_y)-11=-y-9

Y-11=-y-9

2y=2

Y=1

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