Question

(-9)+_________________ =0

Answer 1

Answer:

9

Step-by-step explanation:

-9 and +9 cancel out to result in 0.

Answer 2

Answer:

$\huge\underline\bold\red{Answer}$

Let the the number be x

Then,

$( - 9) + x = 0$

$x = 0 + 9 = 9$

$x = 9$

so, (-9) + 9 = 0