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Bab Sistem Persamaan Linear Dua VariabelMatematika SMP Kelas VIII
2x + y = 12 → dikali 4 menjadi → 8x + 4y = 48
3x + 4y = 23
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5x = 25
x = 5
2x + y = 12 → dikali 3 menjadi → 6x + 3y = 36
3x + 4y = 23 → dikali 2 menjadi → 6x + 8y = 46
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-5y = -10
y = 2
(x, y) = (5, 2)