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primero multiplicas los signos + x - = -
entonces : 3 x - 6 = 18
tenemos 18/9 = 2
b) (-22)/11x(-3)
= - 22/ - 33
esta fracción lo simplificamos, sacándole onceava a cada uno
= - 2/-3
luego eliminamos lo signos iguales
= 2/3