Respuesta:
x = 6
Explicación paso a paso:
3x - 9 = x + 3
3x - x = 3 + 9
2x = 12
x = 12 / 2
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Respuesta:
x = 6
Explicación paso a paso:
3x - 9 = x + 3
3x - x = 3 + 9
2x = 12
x = 12 / 2
x = 6