Reducción de términos Semejantes

+ 9a - 3a + 5a = + ____________________ - ____________________ = + ____________________

+ 12m - 23m - 5m = + ____________________ - ____________________ = - ____________________

+ 7a - 11a + 20a - 31a = + ____________________ - ____________________ = - ____________________

- 7c + 21c + 14c - 30c = + ____________________ - ____________________ = - ____________________

+ 24n + 12n - 13n - 25n = + ____________________ - ____________________ = - ____________________

- 12a + 15a - 3a + 8a = + ____________________ - ____________________ = + ____________________

- 5m + 8m - 6m + 4m = + ____________________ - ____________________ = + ____________________

+ 4b + 5b - 7b - 4b = + ____________________ - ____________________ = - ____________________

+ 15a - 5a + 20a - 10a = + ____________________ - ____________________ = + ____________________

+ 3x - 8x - 12x + 2x = + ____________________ - ____________________ = - ____________________