tolong jawab pake cara

f(x) = 3-2x/3(x-1)
x ≠ 1, f(a+2)...?

f(a+2) = 3-2x / 3(x-1)
          = 3-2(a+2) / 3(a+2)-3
          = 3-2a-4 / 3a+6-3
f(a+2) = -1-2a / 3a+3, x ≠ 1 (B).
Thx.