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3x - y + 2z = 4 | ×2 |
x - 2y + 3z = 3 | ×6 |
________________
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
----------------------- ¯¯
5y - z = 4
Substitusi per. 2 dan per. 3
6x - 2y + 4z = 8
6x - 12y + 18z = 18
------------------------ ¯¯
10y -