Respuesta:
x = 20
Explicación paso a paso:
x= sea la nota
3x - 18 = 2x + 2
3x - 2x = 2 + 18
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Respuesta:
x = 20
Explicación paso a paso:
x= sea la nota
3x - 18 = 2x + 2
3x - 2x = 2 + 18
x = 20