Solve the system. {y = 2x - 1 3x - y = -1 Describe the location of point (-1,6,7) in three- dimensional coordinate space. What are the intercepts of 7x + 2y - 14z = 56? Without graphing, the following system as independent, or inconsistent. {y = -3x + 4 6x + 2y = 8 Which point is not on the plane with equation -2x - 3y + 5z = Solution 11. option B (-2 , -5) 12. option A 13. option C 14. option C 15. option C.