Prove that a+a=a-(-a)

prove that a+a=a-(-a)

Not doing homework.

So it's bullshit then.

Yes. Write that on your worksheet and delete this thread.

>normies and their attempts at reverse psychology
Get out!

i guess i'm right

...

-*-=+

Seriously, everyone just says "it's like this because it's like this" but never explain why.

A negative of a negative is a positive.
quod erat dēmonstrandum