Question

Solve by augmented matrix (GJ)
2x + 3y – 4z = 1
4x + y + 2z = -3
pls help!!

Answer 1

3x-y-2z=4. 2x+3y-4z=1

4x-7y-6z=-7. -x+6y+4z=11

- +. +. +. x+9y=12

____________.

-x +6y +4z=11.