Write a system of equations with the solution ( 2 , 1 , 0 )
Are you missing some part of the problem? I don't quite understand what it is.
maybe that it was solving systems of three equations with elimination??
Well here's a possibility
2x + y - z = 5
5x - 3y + 4z = 7
-6x -7y + 2z = -19
+159 
