Question

I don't get it I got a different answer then these

Answer 1

You should first change the denominator into same number, which is 18

So you multiply the first fraction of both numerator and denominator by 3, and the second by 2:

3(g-2) / 18 - 2(g+3) / 18 = (3g - 6 - 2g - 6) / 18 = (g-12)/18

Answer 2

      3(g-2) - 2(g+3)
=  ---------------------
             18

      3g - 6 -2g - 6
=  ---------------------
             18

       g - 12
=  -----------
         18

this is what i got