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-3x + 4y = 0
baris 1 dikalikan 2
2x + 4y = 10
-3x + 4y = 0
DIkurangi menghasilkan 5x = 10 sehingga x = 2 . Kalau dimasukkan ke persamaan no1 yg awal
2 + 2y = 5
2y = 3
y = 3/2