Question

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable z is eliminated in the first and second equations, then the second and third equations.

3x - 7y - z = -14
3x + 3y + 2z = 1
2x + 5y - 2z = -16
Answers:
3x - 7y = -14
2x + 5y = -16
9x - 11y = -27
5x + 8y = -15
9x - 11y = -27
3x - 7y = -14
2x + 5y = -16
5x + 8y = -15