Respostas

2014-04-03T21:29:21-03:00
3m+12+8-2-m=0
2m+18=0
2m=-18
m= \frac{-18}{2}
m=-9
3 5 3
2014-04-03T21:29:53-03:00
Distribua o 3:
3m + 12 + 8 = 2 + m
3m + 20 = 2 + m

Isole o m:

3m - m = 2 - 20
2m = -18
m = -18/2
m = -9
1 5 1