use matrices and elementary row to solve the following system:
5x - 3x + 2x =13
2x - y - 3z =1
4x - 2y + 4z =12

I assume the first equation is supposed to be

and not

As an augmented matrix, this system is given by

Multiply through row 3 by 1/2:

Add -1(row 2) to row 3:

Multiply through row 3 by 1/5:

Add -2(row 3) to row 1, and add 3(row 3) to row 2:

Add -3(row 2) to row 1:

Multiply through row 1 by -1:

Add -2(row 1) to row 2:

Multipy through row 2 by -1:

The solution to the system is then

i need more information

step-by-step explanation:

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above