Mention the variables and constants from the following equation:$2x-5=7$.

Given :

The given equation is $2x-5=7$.

To do :

We have to mention the variables and constants from the given equation.

Solution :

$2x-5=7$

Variable: A variable is denoted by a symbol that can take any real value. The value of a variable is not fixed.

Constants: are terms without variables.

Therefore,

In $2x-5=7$, x is the variable, $-5$ and $7$ are constants.