1. The problem statement, all variables and given/known data Prove (x+y)(y+z)(x'+z) = (x+y)(x'+z) 2. Relevant equations 3. The attempt at a solution On LHS, i have done till =(y+xz)(x'+z) 1st- distributive =x'y+yz+xz 2nd- distributive(2ce) =(x+y)(x'+z) 3rd-? For third procedure, what properties should be used? I think it could be done in one step but i can't figure it out... Could someone please help me out here?