Question 82001
Does your problem look like this?


{{{sqrt(2x+6)-6=0}}} 


{{{sqrt(2x+6)=6}}}  Add 6 to both sides


{{{(sqrt(2x+6))^2=(6)^2}}} Square both sides


{{{2x+6=36}}} After squaring we get this


{{{2x=30}}} Subtract 6 from both sides


{{{x=15}}} Divide both sides by 2


Check:





{{{sqrt(2(15)+6)-6=0}}} Plug in x=15 


{{{sqrt(30+6)-6=0}}} Multiply


{{{sqrt(36)-6=0}}} Add


{{{6-6=0}}} Take the square root


{{{0=0}}} works. This verifies our answer.