Question

TETETA I (Find out the value of x, y, z by matrix method.)
3x + y-z=3
2x + z = 10
5x-y-2z = -3​

Answer 1

Answer:

$3x + y - z = 3 \\ 3x = 3 - y + z \\ x = 3 - y + z \div 3 \\ x = z - y \\ \\ \\ 2x + z = 10 \\ z = 10 - 2x \\ \\ \\ \\ \\ 5 \times - y - 2z = - 3 \\ - y = 2z - 3 - 5x$