Respuesta:
(3x + 4 - 5x + 7) + (12 -5x +2 +3)
(7x - 12x) + (12 - 5x +5)
5x + (12 - 10x)
5x + 2x
7x
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Respuesta:
(3x + 4 - 5x + 7) + (12 -5x +2 +3)
(7x - 12x) + (12 - 5x +5)
5x + (12 - 10x)
5x + 2x
7x