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X^2+3*x-(4*y)-(23/4) = 0
X^2+3*x-4*y-23/4 = 0
X^2+3*x-4*y-23/4 = 0 // - X^2-4*y-23/4
3*x = -(X^2-4*y-23/4) // : 3
x = (-(X^2-4*y-23/4))/3
x = (23/4-X^2-(-4*y))/3
x = (23/4-X^2-(-4*y))/3
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