Question 354176
x=sqrtx+6
sqrtx=x-6 square both sides.
x=x^2-12x+36
x^2-12x-x+36=0
x^2-13x+36=0
(x-9)(x-4)=0
x-9=0
x=9 ans.
Proof:
9=sqrt9+6
9=3+6
9=9