Answer:

The statement 2 + x = 5 may be true or false depending on the value of x. If x = 1 then 2 + 1 = 5 is false. If x = 3 then 2 + 3 = 5 is true. Thus, we can say that the mathematical sentence containing the variable becomes either true or false depending upon the value of the variable.

Step-by-step explanation:

If a proposition is true, then we say it has a truth value of "true"; if a proposition is false, its truth value is "false