. We know that the square root of 16 is ±4, so now our equation is ±4 - 
=11. I'm guessing since the problem only has one solution it's most likely only positive 4, so let's revise our equation to 4 - 
to get 
, which we can rationalize (remove the square root from the denominator so that it's a proper answer) by multiplying by 
(which is equal to one so we can use it) which is equal to 
. Let's finish this by simplifying it. 
(2x
). We can simplify it further by simplifying the 2, making it 
Solve for x.
Sqrt8 (Sqrt2 - x) = 11
...
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