12
1 p.m. (13.00) because then it will be 11 a.m. add 2 hrs
23
add -10... 11 + (-10) = 11-10=1 ur welcome! So that would be 2x + 11 = 1 where x = -5.
11
The numbers are -1 and -11 because -1 times -11 = 11 and (-1)+(-11) = -12
21
because if you add 1 to 12 you will get one more not less.
add 2 hr and 11 hrs and get get 1 o'clock
11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 1 = 100
11
-10+11= 1
you can add Mod 12, this is like clock math. If it is 11 o'clock and you add 2 hours, it is then 1 o'clock. This is called addition Mod 12.