coursehero....the question IS complete...refer to the image. i posted. they want you to solve the system of linear equations using the Gauss-Jordan elimination method........solve 18 and 20 only. (please baby steps...explain in detail)

In Exercises 17-24, solve the system of linear equations using the Gauss-Jordan elimination method. 17. 2x - 3y = 5 18. 3x + 2y = 3 3x + 4y = -1 2x - 4y = -14 19. x - y + 2z = 5 20. 3x - 2y + 4z = 16 7 3x + 2y + z = 10 2x+ y - 2z = -1 2x - 3y - 2z = -10 x + 4y - 8z = -18 21. 3x - 2y + 4z = 11 2x - 4y + 5z = 4 x + 2y - z = 10 22. x - 2y + 3z + 4w = 17 2x+ y - 2z -3w =-9 3x - y + 2z - 4w = 0