<u>Answer:</u>
The correct answer option is '='.
<u>Step-by-step explanation:</u>
There a number of different mathematical symbols to show equality or inequality or to compare two values if they are lesser or greater than the other value.
The symbol '=' means 'equals' or 'equal to',
the symbol '<' means lesser than; and
the symbol '>' means greater than.
So if x equals 3, then the symbol of 'equal to' will be used which is '='.