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3\sqrt{5}x=\sqrt{30+6\sqrt{5}}\sqrt{60-24\sqrt{5}}
Swap sides so that all variable terms are on the left hand side.
3\sqrt{5}x=\sqrt{60-24\sqrt{5}}\sqrt{6\sqrt{5}+30}
The equation is in standard form.
\frac{3\sqrt{5}x}{3\sqrt{5}}=\frac{30-6\sqrt{5}}{3\sqrt{5}}
Divide both sides by 3\sqrt{5}.
x=\frac{30-6\sqrt{5}}{3\sqrt{5}}
Dividing by 3\sqrt{5} undoes the multiplication by 3\sqrt{5}.
x=2\sqrt{5}-2
Divide 30-6\sqrt{5} by 3\sqrt{5}.