1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution I don't understand how they get the numbers on the right. This is a null space problem so the 3x3 matrix = 0. By my reckoning (1/3)x3 = 0 so x3 = 0. So then I try the second row. 2x3 = (3/2)x2 Divide both sides by two and x2 = 3/4 Plug that into the first row and we have 2x1 - 3 [(3/4)x3] - 2x3 = 0 Simplify x1 = (11/8)x3 It's now clear that I'm in disagreement with the book.