I think that you are over simplifying by saying that your future is only one variable. Just like algebra, there are numerous possible answers for what X and Y are.
For every variable you solve for, you create a whole host of new variables. Everyone else is doing the same, me thinks. Also, there is no mathematical system to live by, for life is in total flux and the only thing that is
constant is change. Personally, everything I enjoy involves change, and nearly everything I hate is static and rather repetitious. I gather that perhaps you are looking for comfort rather than the solution to life. If this is the case, mathematics isn't the way to find it.
Just an opinion from a barbie with brains! >

tink