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5/8 = ((2*x)/3)*x-24 // - ((2*x)/3)*x-24
5/8-(((2*x)/3)*x)+24 = 0
(-2/3)*x^2+5/8+24 = 0
-2/3*x^2 = -197/8 // : -2/3
x^2 = 591/16
x^2 = 591/16 // ^ 1/2
abs(x) = (591/16)^(1/2)
x = (591/16)^(1/2) or x = -(591/16)^(1/2)
x in { (591/16)^(1/2), -(591/16)^(1/2) }
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