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3x+y=10, ubah persamaan menjadi y = -3x + 10
Lalu substitusikan ke persamaan 2x + 4y = 6
2x + 4 (-3x +10) = 6
2x - 12x + 40 = 6
-10 x = -34
x = 3,4
Masukkan lagi ke persamaan y = -3x + 10 = -3 (3,4) + 10 = -102
x=3,4 ; y=-102