x+1 = x+1

Question

?+1 = ?+1

Answer 1

The equation $x+1=x+1$ is an identity, meaning it holds true for any value of $x$.

For the expression $?+1=?+1$, the same principle applies. The question marks can represent any variable or number, and the equation will always be true as long as the two sides are identical.

In simpler terms, if you replace the question marks with any value, the equation will still hold true. For example, if you let $a=5$, then $5+1=5+1$ is true.

Thus, both equations state the same concept: they are always true regardless of the value assigned.