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menjadi
2y+3x=xy |x4 ⇒ 8y+12x=4xy ⇒ 8y+12x=4xy
8y-12x=5xy |x1 ⇒ 8y-12x=5xy ⇒ 8y-12x=5xy
___________ + ___________ -
16y = 9xy 24x = -xy
16 = 9x 24 = -y
x = 16/9 y = -1