Questions:
Inconsistent or dependent system of equations
Solve the system of linear equations. If the unique solution does not exist state weather the system is inconsistent or dependent.
1. -x - y = 4
x -y = -8
2. 3x - 2y = 23
x +5y = -15
3. 4x + 2y = 4
y = 2 - 2x
4. 4x - 3y = 9
2x + y = 12
5. 5x + 4y = 40
x + 2y = 11