Question

{+9}-{-9}
it's easy but I need answer
even I too know but it's a silly doubt
there are 2 types
ans-
{a}- 0
{b}- 18

which one is correct????
I'll mark brainleist
please solve this​
it's urgent

Answer 1

Answer:

18

Step-by-step explanation:

{+9}-{-9}

- of - = +

+9+9

=18

HOPE IT HELPS :)