Is this a riddle? IDK, add 11 and 2 and you get 13, which is ONE answer? Or maybe if you add 11 and 2 and divide all of that by by 13, or take 13^0?
add 2 hr and 11 hrs and get get 1 o'clock
1 p.m. (13.00) because then it will be 11 a.m. add 2 hrs
-11
31
It's 11
-9 + 11 = 2
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.
11 + 2 = 13
add -10... 11 + (-10) = 11-10=1 ur welcome! So that would be 2x + 11 = 1 where x = -5.
15
b-11 = -13 add 11 to BOTH sides b = -2