Page 11 - Matematika Kelas X - Sistem Persamaan Tiga Variabel

8(–1) – 7z = –22

–8 – 7z = –22

–7z = –14

z = 2 ........................................................................................ (6)

sustitusi pers.(4) dan pers. (6) ke persamaan (1)

x + 3y – 3z = –7

x + 3(–1) – 3(2) = –7

x – 3 – 6 = –7

x – 9 = –7

x = 2

Jadi himpunan penyelesaiannya HP = {(2, –1, 2)}

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