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(9*x^2)/3-((53*x^1)/3)-6 = 0
(9*x^2)/3+(-53/3)*x-6 = 0
3*x^2-53/3*x-6 = 0
DELTA = (-53/3)^2-(-6*3*4)
DELTA = 3457/9
DELTA > 0
x = ((3457/9)^(1/2)+53/3)/(2*3) or x = (53/3-(3457/9)^(1/2))/(2*3)
x = ((3457/9)^(1/2)+53/3)/6 or x = (53/3-(3457/9)^(1/2))/6
x in { (53/3-(3457/9)^(1/2))/6, ((3457/9)^(1/2)+53/3)/6 }
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