May 2019 1 40 Report
Diketahui sistem persamaan linear tiga variabel berikut :

4x + 3y + z = a (1)
2x + 4y + 4z = a + 5b (2)
3x - y + 2z = a - 2 (3)

Jika himpunan penyelesaian sistem persamaan tersebut adalah (-5, 2, 1), nilai a - b =

A. -10

B. -13

C. -16

D. -18

E.-20


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