x - y + 2z = 5 2x + y - z = 9 x -2y +3x =4

ini menurut saya jawabannya tapi mohon di koreksi itu di pers 3 x -2y +3 x atau z =4. ???

x - y + 2z = 5| × 2| 2x - 2y + 4x = 10
2x + y - z = 9| × 1| 2x + y - z = 9_
-3y + 5z = 1
2x + y - z = 9| × 1| 2x + y - z = 9
x - 2y + 3z = 4| × 2| 2x - 4y + 6z = 8_
5y - 7z = 1
SPLDV
-3y + 5z = 1| × 5| - 15y + 25z = 5
5y - 7z = 1| × 3| - 15y - 21z = 3 + 4z = 8
z = 2
-3y + 5(2) = 1
-3y = 1 - 10
y = 3
x - y + 2z = 5
x - 3 + 4 = 5
x = 5 + 4 - 3 b
x = 4