d) 3(x + 4) - 4x = 12 - x. AYUDAAAAAAAAAAAAAAAA DOY CORONA AL QUE RESPONDA BIEN o sino lo reportó
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Respuesta:
buenas buenas, ya te ayudo.
3(x + 4) - 4x = 12 - x
3x + 4 - 4x = 12 - x
4 - 12 = -3x +4x -x
-8 = -4x +4x
-8 = x