Question

x +100=?
Answer it fast I am in online class

Answer 1

x + 100 = 0

x = -100

so ,

x + 100 = 100-100 = 0

Answer 2

Question-

x + 100 = ?

Answer-

$x=-100$

Explanation-

If the ? doesn't represent zero then the answer is $x+100$.

And if ? represent zero then the explanation is as follow

$x+100=0$

$\implies x=-100$