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3x -2y = -27 dikali 2 => 6x - 4y = -54
dieliminasi 6x nya jadi => 25 y = 75 -> y = 3
disubtitusikan
3 x - 2 y = - 27
3 x - 2(3) = - 27
3x = -27 +6
3x = -21
x = - 7
thankiss
3x - 2y = -27 x2
jadi,
6x + 21y = 21
6x - 4y = -54
kta kurangkan
jadi 25y = 75
y = 75 : 25
y = 5
subtitusikan nilai y kepersamaan 1
2x + 7(5) = 7
2x + 35 = 7
2x = 7 - 35
x = -28 : 2
x = -14
jdi hp nya (-14 dan 3)