Solve the system exactly. Be sure to express the coordinates of your solution in lowest terms with rational denominators.

 {y=6x3+6y=x76\displaystyle {\left\lbrace\begin{array}{c} {y}={6}{x}\sqrt{{{3}}}+{6}\\{y}=-{x}\sqrt{{{7}}}-{6}\end{array}\right.} 

 (x,y)=\displaystyle {\left({x},{y}\right)}=