SOLUTION: {{{x+sqrt(3x+1)=13}}}

Question 464614:
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Transpose x to the right side:

Square both sides:

<==>
<==> 0 = (21 - x)(8 - x) ==> x = 21, 8.
x = 21 is not a solution, because 21 > 13, and .
x = 8 satisfies the equation, and thus is the final answer.

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