I have big problems with an equation system. It's been a long time since I worked with these type of problems and it would be wonderful if I could get an full solution of this or some similar problem. Decide for all real a and b, the number of solutions to the equation system. I begin with finding the determinant and get 2a-2 Is this even the right way to start? Should I put a=1 into the equation and use Gauss elimination?