I am 42 years young and trying to brush up my 25 year old shelved algebra knowledge.

I am stumped with this problem.

I have the answer, but I don't know how to get there exactly. I know I will have to square both sides and that it will wind up as a Quad equation, but I am sooo lost on how to get there.

Please help! Thanks!

$\displaystyle

4\sqrt{x-1}+1=x

$