Question 538707
{{{ sqrt(2y+1)-19=0 }}}--->{{{ sqrt(2y+1)=19}}}
Square both sides (keeping in mind that you risk adding extraneous solutions) to get
{{{2y+1=19^2}}}-->{{{2y+1=361}}}-->{{{2y=360}}}-->{{{y=180}}}
At this point you verify to make sure that you did not add an extraneous solution, but it's OK.