2x + y + z = 4 3x - y + 2z = 4 X - 2y + 3z = 3 selesaikan SPLTV diatas menggunakan metode substitusi. tolong bantuuuu! saya bener2 gak paham

2x + y + z = 4 | ×3 |
3x - y + 2z = 4 | ×2 |
x - 2y + 3z = 3 | ×6 |
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6x + 3y + 3z = 12
6x - 2y + 4z = 8
6x - 12y + 18z = 18

Substitusi per. 1 dan per. 2
6x + 3y + 3z = 12
6x - 2y + 4z = 8
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5y - z = 4
Substitusi per. 2 dan per. 3
6x - 2y + 4z = 8
6x - 12y + 18z = 18
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10y -