Respuesta:
5 y -5
Explicación paso a paso:
x+y = 0
x+15 = 2y
x = 2y -15
Reemplazando :
2y -15 + y = 0
3y =15
y = 5
x = -5
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Respuesta:
5 y -5
Explicación paso a paso:
x+y = 0
x+15 = 2y
x = 2y -15
Reemplazando :
2y -15 + y = 0
3y =15
y = 5
x = -5