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(x + 2) . 4 - 3 = x - 7
4 (x + 2) - 3 = x - 7
4x + 8 - 3 = x - 7
4x + 5 = x - 7
4x - x = - 7 - 5
3x = - 12
x = - 12/3
x = - 4
Respuesta.
x = - 4