1. The problem statement, all variables and given/known data Suppose are h and k are unknown constants. The equations are: -3x-5y-6z=-4 8x+6y-9z=8 19x+17y+hz=k if h≠A then A=? 2. Relevant equations 3. The attempt at a solution I know that h is some number so that this system of equations has one or more solutions. Yet I'm having trouble where to start.