How do i solve two-step equations

ex. 3g+5=17

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!

3g+5=17
      -5   -5  your subtracting the number
       3g = 12
12 divided by 3 = 4 
         

Polar coordinates is 8,9