$$\left. \begin{array} { l } { \quad A = x + 5 + ( 3 x + 1 ) ( x + 5 ) } \\ { B = ( 3 x - 1 ) - ( 3 x - 1 ) ^ { 2 } } \\ { C = x + 4 + ( x + 6 ) ( 2 x + 1 ) + 2 } \end{array} \right.$$
$x=\frac{3A+B-28}{60}$
$\left(A=\frac{-B+10\sqrt{1-4B}+58}{3}\text{ and }C=-\frac{2B}{9}+\frac{8\sqrt{1-4B}}{3}+\frac{176}{9}\right)\text{ or }\left(A=\frac{-B-10\sqrt{1-4B}+58}{3}\text{ and }C=-\frac{2B}{9}-\frac{8\sqrt{1-4B}}{3}+\frac{176}{9}\right)$
$x=\frac{3A+B-28}{60}$
$\left(A=\frac{-B+10\sqrt{1-4B}+58}{3}\text{ and }C=-\frac{2B}{9}+\frac{8\sqrt{1-4B}}{3}+\frac{176}{9}\text{ and }B\leq \frac{1}{4}\right)\text{ or }\left(A=\frac{-B-10\sqrt{1-4B}+58}{3}\text{ and }C=-\frac{2B}{9}-\frac{8\sqrt{1-4B}}{3}+\frac{176}{9}\text{ and }B\leq \frac{1}{4}\right)$
