ini bagaimana ya? tolong bantu saya. trmksh

2x + 2y - z = 8
3y - z = 10
5x - 2y = - 2

3y - z = 10
- z = 10 - 3y
z = 3y - 10

2x + 2y - z = 8
2x + 2y - (3y - 10) = 8
2x + 2y - 3y + 10 = 8
2x - y = 8 - 10
2x - y = - 2

5x - 2y = - 2|× 1
2x - y = - 2|× 2

5x - 2y = - 2
4x - 2y = - 4
_________—
x = 2

2x - y = - 2
4 - y = - 2
- y = - 2 - 4
- y = - 6
y = 6

z = 3y - 10
z = 18 - 10
z = 8

Maaf Kalau Salah