2x - 3y + z = 19 3x + 2y -2z=2 x - 4y - z =14 tolong ya secepatnya gunakan cara

6x - 9y + 3z = 57
6x + 4y - 4z = 4
-------------------------- dikurang
- 13y + 7z = 53 --> persamaan 4

2x - 3y + z = 19
2x - 8y - 2z = 28
------------------------- dikurang
5y + 3z = -9 -->persamaan 5

-13y + 7z = 53
5y + 3z = -9

-39y + 21z = 159
35y + 21z = -63
----------------------------- dikurang
-4z = 222
z = - 55.5

5y + 3z = 19
5y - 166.5 = 19
5y = 185.5
y = 37.1


6x + 4y - 4z = 4
6x + 148.4 - 222 = 4
6x = 4 - 148.4 + 222
6x = 77.6
x = 12.9