Question 366747
{{{x = 3*sqrt(x)}}},
{{{x-3*sqrt(x) = 0}}},
{{{sqrt(x)(sqrt(x) - 3) = 0}}},hence 
{{{sqrt(x) = 0}}}, or {{{sqrt(x) - 3 = 0}}}.
{{{sqrt(x) = 0}}} means x = 0, after squaring both sides, and 
{{{sqrt(x)-3 = 0}}} means x = 9, after transposition and squaring both sides.  Since x=0, or x =9 satisfy the original equation, they are the final answers.