a)$\sqrt[3]{7x-8}+\sqrt{\frac{7-2x^{2}}{6}}=x$
b)$\sqrt[3]{3x^{2}-3x+3}+\sqrt{\frac{x^{3}}{3}-\frac{3}{4}}=\frac{1}{2}$
c) $\left\{\begin{matrix}
\frac{10}{2x+3y}+\frac{1}{xy}=1 & & \\
\frac{124}{4x^{2}+9y^{2}}-\frac{1}{(xy))^{2}}=\frac{1}{2} & &
\end{matrix}\right.$