The % symbol is still needed. You'll find that the code %[[1]][[1]] will access the expression

with no curly braces. Incidentally, in Mathematica, the arrow symbol is not assignment. If you type in the symbol

, you're just going to get the symbol right back at you (i.e., Mathematica doesn't know what it is.) Try this command:

right after the Solve command. The /. symbol is a replace command. For example: if I type in

, the result will beCode:Solve[x^2-1==0,x]

If immediately after that I go withCode:{{x->-1},{x->1}}

the result isCode:x/.%[[1]][[1]]

Make sense?Code:-1