xy + x = y(x - 2) -14
x² + y = x(x+3)+7
xy + x = xy - 2y -14
x² + y = x²+3x+7
x = - 2y -14
y = 3x+7
y = 3( - 2y -14) + 7
y = -6y - 42 + 7
7y = - 35
y = -5
x = -2y - 14 = 10 - 14 = -4
