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En la ecuacion " 1 " :
3x - my = 9
x → -1
y → 3
Entonces :
3 ( - 1 ) - m ( 3 ) = 9
- 3 - 3m = 9
- 3m = 9 + 3
- 3m = 12
m = 12/- 3
m = - 4
En la ecuacion " 2 " :
nx + 4y = 11
n ( - 1 ) + 4 . 3 = 11
- n + 12 = 11
- n = 11 - 12
- n = - 1
n = 1
Solución : Respuesta " A ) "
m → - 4
n → 1