Question

how to prove [-(-x)]=x

Answer 1

Step-by-step explanation:

From the definition, it follows that x is the inverse of y- and if you have already proved that negatives are unique in a group, that x is the inverse of -x or x= -(-x). Using Axioms of real numbers: Lemma 1: 0 is unique. 0x + x = (0 + 1) x = 1x = x.

Answer 2

Answer:

Easy!

Step-by-step explanation:

lets say, x=a

So, (-(-a))=a

in mathematics,

minus + minus= plus

plus+ plus= plus

minus+ plus= minus

plus + minus = minus

-(-a)=a