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3(x - 5) = 33
3x - 15 = 33
3x = 33 + 15
3x = 48
x = 48/3
x = 16
Comprobacion.
3(x - 5) = 33
3(16 - 5) = 33
3(11) = 33
33 = 33
Respuesta.
x = 16