How do I solve two-step equations

ex. 3g+5=17

3g+5=17

-5 - 5 your subtracting the number

3g = 12

12 divided by 3 = 4

Easy! you first subtract the 5 to itself and to the 17, so 5 - 5 and 17 - 5. your equation should look like 3g = 12. since we need to isolate the variable (g) we need to divide 3 by itself and 12 by 3, so 3 : 3 and 12 : 3. now you have g = 4!