1. The problem statement, all variables and given/known data For what values of x are the vectors,  [x] [2x]  [-1] [-2]   [x] linearly dependent? 2. Relevant equations 3. The attempt at a solution I made a matrix, [1 ; 1 ; 2 ; 0] [x ;-1 ; 1 ; 0] [2x;-2 ; x ; 0] but I'm having trouble figuring out how to get rid of the x's in the first row, if I get rid of one of the x's then I'm left with nothing to get rid of the other.