Question 487718
first, you write radical (of x) symbol like this: 

sqrt(x), than you put {{{ in front and }}} after sqrt(x) and you will get a symbol

{{{sqrt(x)}}}...the "square root function"


{{{sqrt(3w+4) =sqrt(7w-12)}}}...if square root of two numbers or expressions are same, than these numbers or expressions are same too; so, you will have

{{{3w+4=7w-12}}}

{{{12+4=7w-3w}}}

{{{16=4w}}}

{{{16/4=w}}}

{{{highlight(4=w)}}}