1. Expand
- 3 - 4m = 28m - 28 - 7m
2. Simplify 28m - 28 - 7m to 21m - 28
- 3 - 4m = 21m - 28
3. Add 4m to both sides
- 3 = 21m - 28 + 4m
4. Simplify 21m - 28 + 4m to 25m - 28
-3 = 25m - 28
5. Add 28 to both sides
- 3 + 28 = 25m
6. Simplify - 3 + 28 to 25
25 = 25m
7. Divide both sides by 25
1 = m
8. Switch sides
m = 1
