Answer:
Step-by-step explanation:
Alright, lets get started.
The given is :
\(63+?=87\)
Suppose the asked number is x, so
\(63+x=87\)
It means we need to find x.
If we subtract 63 from both sides, the give equation will become:
\(63+x-63=87-63\)
\(x=24\)
So the missing number is 24 : Answer