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x - 2y = 4 | x 2 menjadi 2x - 4y = 8
----------------- -
3y = -3
y = -3 / 3
y = -1
2x - y = 5
2x - (-1) = 5
2x + 1 = 5
2x = 5 - 1
2x = 4
x = 4/2
x = 2
maka himpunan penyelesaiannya adalah x = 2 dan y = -1
semoga membantu :)