It's an equation and its solution is: x = -12
408
000-099 = -99
4202. (Note: we do not normally write a two digit number such as 33 by using three digits.)
.099 ton
4121
79.642
1.0
3
0.99 = 99/100
It is impossible to say without knowing what country you're asking about. There are several countries with a domestic telephone area code 099 or similar.
.10
a man named stupid