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3x + 4y = 1 dikalikan 2
2x + 1y = 8 dikalikan 3
6x + 8y = 2
6x + 3y = 24
dikurangi
5y = -22
y = -22/5
y = 4,4
di subtitusikan
3x + 4y = 1
3x + 4(4,4) = 1
3x + 17,6 = 1
3x = - 16,6
x = - 16,6/3
x = - 5,53