Respuesta :

4m+2m=7-10+15
6m=12
m=12:6
m=2
- 7 + 4m + 10 = 15 - 2m
4m + 2m = 15 + 7 - 10
6m = 12
m = 12 : 6
m = 2
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- 7 + 4 * 2 + 10 = 15 - 2 * 2
      - 7 + 8 + 10 = 15 - 4
                      11 = 11