Respuesta :

gavrioli
8 - 4m - 20 = 3m - 27 

- 4m - 12 = 3m - 27
+4m          +4m

        - 12 = 7m - 27
        +27          + 27
 
         15 = 7m

m = 15/7 

 
sav1017
1. subtract 4 from 8;
4(m+5)=3(m-9)

2. distribute:
4m+20=3m-27

3. subtract 20 to both sides:
4m=3m-47

4. subtract 3m from both sides:
m=-47