I've been trying to attempt a particular question that I need to translate truth table into boolean expression but I'm completely stuck on one point now.
First, I worked it out by using Sums of product by getting X first.
(I did this by taking the inputs with X = 1)
A'B'C'D' + A'B'C'D + A'B'CD + A'BC'D' + A'BCD' + A'BCD +AB'C'D + AB'CD + ABC'D' + ABC'D
= A'B'C'(D'+D) + A'CD(B'+B) + A'BC(D+D') + AB'D(C'+C) + ABC'(D'+D) (Distributive Law)
= A'B'C' + A'CD + A'BC + AB'D + ABC' (Double Complement Law)
[Currently I'm stuck here and don't know how to proceed]