[CS4][Help]Math problem

[FONT=Tahoma]Ok, i wish to cut this short as possible so that you all will understand… So basically i’m making a game, and it’s a quiz to be exact and each time you get the answer wrong it’ll subtract 1 point away from your point static text.
So… I have 3 selection,
1st = 12
2nd = 15
3rd = 18.
The questions asks my age, so the 1st is the answer, i made all the 3rd selection buttons.
For the 1st selection, i made the action brining it to frame 2, No problem with that.
But it the problem comes at the 2nd selection, the 2nd selection is the wrong answer but i want it to subtract from the point [/FONT]… How do i do it?