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3x - xy = 10
y + xy = 6
x(3-y) = 10
y+xy = 6
x = 10/(3-y)
y + 10y/(3-y) = 6
y(3-y) + 10y = 6(3-y)
3y - y2 + 10y = 18 - 6y
y2 - 6y - 13y + 18 = 0
y2 - 19y + 18 = 0
y1 = 18
y2 = 1
x1:
18 + 18x = 6
3 + 3x = 1
x = -2 / 3
x2:
1 + x = 6
x = 5
y + xy = 6
x(3-y) = 10
y+xy = 6
x = 10/(3-y)
y + 10y/(3-y) = 6
y(3-y) + 10y = 6(3-y)
3y - y2 + 10y = 18 - 6y
y2 - 6y - 13y + 18 = 0
y2 - 19y + 18 = 0
y1 = 18
y2 = 1
x1:
18 + 18x = 6
3 + 3x = 1
x = -2 / 3
x2:
1 + x = 6
x = 5
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