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X^2-((19*x)/6)+5/2 = 0
X^2+(-19/6)*x+5/2 = 0
X^2-19/6*x+5/2 = 0 // - X^2+5/2
-19/6*x = -(X^2+5/2) // : -19/6
x = (-(X^2+5/2))/(-19/6)
x = 6/19*(X^2+5/2)
x = 6/19*(X^2+5/2)
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