Question

(-9) +_________=0 ........​

Answer 1

$( - 9) + (9) = 0$

Explantion :

when -9 is added to + 9 then the answer is zero that's because plus minus cancelled .

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Answer 2

Answer:

=> Hence, the missing value will be 9.

Step-by-step explanation:

In context to questions asked,

We have to determine the missing value,

It is given that,

$(-9) + ....=0$

Let, the missing value be 'x',

So, it is written as:

=> $(-9) + x=0$

Rearranging the terms,

=> $x -9 = 0$

Add both sides by $9$,

=> $x - 9 + 9 = 0 + 9$

=> $x =0+9$

Add the numbers,

=> $x = 9$