[tex]Formula\ for\ absolute\ value\\\\
|a|=a,\ for\ a \geq 0\\ or\\|a|=-a,\ for\ a<0\\\\|x-84|=0,5\\\\
x-84=-0,5\ \ \ or\ \ \ \ x-84=0,5\\
x=-0,5+84\ \ \ \ or \ \ \ x=0,5+84\\
x=83,5\ \ \ \ \ \ \ \ \ \ \ or\ \ \ x=84,5\\\\The\ lightes\weight\ is\ 83,5\ ounce\ and\ the\ heaviest\ is\ 84,5\ ounce.[/tex]