Respuesta:
1.
4m+5m+n+2n
9m+3n
2.
7a + 6a-9b-4b
13a+13b
3.
a-a+b-b-c-c+2c
=2c
Espero no haberme equivocado...
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Respuesta:
1.
4m+5m+n+2n
9m+3n
2.
7a + 6a-9b-4b
13a+13b
3.
a-a+b-b-c-c+2c
=2c
Espero no haberme equivocado...