Given: f(x) = 5x – 1; Find f(a-2) f(x) = 5x - 1 Just replace every x you see with (a-2) f((a-2)) = 5(a-2) - 1 then simplify f(a-2) = 5a - 10 - 1 f(a-2) = 5a - 11 That's all there is to it! Edwin