Respuesta :

x=the man's age
500-2x=394
-500       -500
-2x=-106
-2x/2=-106/-2
x=53

FINAL ANSWER: 53 years old

Hope this helps! :)
500-2x=394
-500       -500

-2x=-106

-2x/2=-106/-2
       =53 years old.