This document discusses the values of b that satisfy the equation 9x=b (mod 12) within the set of integers modulo 12 (CLOCK12). It determines that the only value of b that is greater than 0 and satisfies the equation is b=9, since setting 9-b=k*12 yields b=9 when k=0 or b=-3 when k=1, but b must be greater than 0.