could someone please explain how to do this step by step? $$\sqrt{x-7}-2=0$$

Question

could someone please explain how to do this step by step?  $$\sqrt{x-7}-2=0$$

anonymous · Answer

add 2 to both sides to get 
$$\sqrt{x-7}=2$$ square both sides to get 
$$x-7=4$$ add 7 to both sides to get 
$$x=11$$

anonymous · Answer

check is 
$$\sqrt{11-7}-2=\sqrt{4}-2=2-2=0$$

lgbasallote · Answer

*sigh* i have been waiting for ages to point out a mistake of @satellite73 when will that ever happen =_=

anonymous · Answer

satellite73 are you going to be on for a bit?  I may need more help on problems? And HUGE TY TY TY

lgbasallote · Answer

satellite is a busy guy :p i would love to help you...but i ahve finals in a few minutes

anonymous · Answer

i turn in to a pumpkin at the stroke of 9:30

anonymous · Answer

go ahead and post, happy to help
@lgbasallote  i make mistakes constantly, but i prefer to call them "typos"

anonymous · Answer

that is what this is for, I need to write detailed notes on how to do these and other problems, he gave example questions Sigh LOL

anonymous · Answer

LOL ok, I wish now I was a better note taker bigtime, or that my teacher was a better explainer LOL