why is this true..im having hard time understanding this or maybe someone can simplify for me
so today I learned a integer such as any -# + or x another -# always = +# why?
I missed something obv, I know its supposed to be very simple can ne one explain in a way I can understand it simply?
thankyou
also its been 20yrs since I was in school..so math is a little foggy for me.