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3x + 2y = 17 (semuanya di kali 2)
2x + 3y = 8 (semuanya di kali 3)
Jadilah ...
6x + 4y = 34
6x + 9y = 24 (kurangi)
Hasil: -5y = 10
y = 10:(-5)
y = -2
Mencari x:
2x + 3y = 8
2x + 3(-2) = 8
2x - 6 = 8
2x = 8 + 6
2x = 14
x = 14:2
x = 7
Semoga membantu.