Greetings and Happy Holidays!
Solve for x:
[tex] \sqrt{x}+11=15[/tex]
Add -11 to both sides:
[tex](\sqrt{x}+11)+(-11)=(15)+(-11)[/tex]
[tex]\sqrt{x}=4[/tex]
Sqaure both sides.
[tex]\sqrt{x}^2=4^2[/tex]
[tex]x=16[/tex]
The Answer Is:
[tex]\boxed{x=16}[/tex]
I hope this helped!
-Benjamin