Solving for $$x$$ is that much tough!!

Algebra Level 4

Find the largest value of $$x$$ such that: $\large \sqrt{x}\left(9^{\sqrt{x^{2}-3}}-3^{\sqrt{x^{2}-3}}\right)=3^{2 \sqrt{x^{2}-3}+1}-3^{\sqrt{x^{2}-3}+1} +6 \sqrt{x}-18$

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