$x=\frac{\sqrt{3y+102}}{3}+3$
$x=-\frac{\sqrt{3y+102}}{3}+3$

$x=\frac{\sqrt{3y+102}}{3}+3$
$x=-\frac{\sqrt{3y+102}}{3}+3\text{, }y\geq -34$

$y=3x^{2}-18x-7$