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2x + 3y = 18
(atas dikalikan 2 yang bawah dikalikan 3) menjadi
6x - 4y = 2
6x + 9y = 54
hasilnya - 13 y = - 52
y = 4
lalu dimasukkan ke salah satu persamaan
6x - 4y = 2
6x -4(4) = 2
6x -16 = 2
6x = 18
x = 3
2x + 3y = 18 | x3 | 6x + 9y = 54
-13y = -52
y = -52 : -13 = 4
3x - 2(4) = 1
3x - 8 = 1
3x = 1 + 8
3x = 9
x = 9 : 3 = 3
=> x adalah 3 dan y adalah 4