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17ab - 13ab + 5ab - 6ab = Sumas los números y dejas la parte literal
igual
(17 - 13 + 5 - 6)ab =
(22 - 19)ab =
3ab
Respuesta.
3ab
17ab+5ab= 22ab
-13ab-6ab= -19ab
22ab-19ab= 3ab
............Kd