algebra 1

If $50x = 500$, then: 

Divide both sides by $50$:

$\frac{50x}{50} = \frac{500}{50}$

This simplifies to:

$x = 10$

 guest.exe

Hmm. . . I'm not sure why you changed your question to $60-5x$. Anyways, you can't solve for $x$ in this situation; as the equation isn't complete. But you can simplify it into: 

$\frac{60-5x}{5}= 12-x$

 guest.exe