Question: converting from location to number?

This might be a stupid question, but I'm a novice.

I'm using Minimize from the Optimization package, and the ansewr I get is x=5 (lets say).

now, I want to plot that 5 with it's y (let's say y=2), so what I really need is just the 5. not the x=5.

I can't seem to find how do I do that. convert has nothing, nor does anything else. I was thinking even to try and replace the = with := but I can't find how to.

anyone?? am I that stupid?

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