Respuesta :

4m+7= -3m+49

Subtract 7 from both sides

4m+7= -3m+49
      -7          -7
4m= -3m+42

Then add 3m to both sides

4m= -3m+42
+3m  +3m
7m=42

Then divide by 7 to get mm by itself

7m=42
m=6

Hope this helps!