System of equations

1. Describe the graph of 2x + y = 11 and 2x + y = 2. Determine the number of solutions.
2. Is the system consistent and independent,consistent and dependent or inconsistent?
   9x + 12y = 8 and
3. Solve the system using the linear combination method.
   3x - y - z = 4
   x - 3y + z = - 8
   -3x - 3y + z = - 4