3z - 4 = 6z - 17
Now subtract 3z from both sides of the equation:
3z - 4 - 3z = 6z - 17 - 3z
- 4 = 3z - 17
Now you can add 17 to both sides of the equation:
- 4+ 17 = 3z - 17 + 17
17 - 4 = 3z
13 = 3z
So now you can divide both sides of the equation by 3 to find the value of 'z' on it's own:
13/3 = 3z/3
13/3 = z
So the answer is z = 13/3 (or z = 4.33333.... )