Answer: c ≤ 5
Explanation: The addition of 2.5 to both sides of the inequality results in the following expression:
The mathematical inequality of "c - 2.5 + 2.5 ≤ 2.5 + 2.5" can be expressed in an academic manner as follows: The given inequality implies that the value of "c" subtracted by 2.5 and then added by 2.5 should be less than or equal to the sum of 2.5 and 2.5.
By simplifying both the left and right side, we obtain:
The variable "c" has an upper bound of 5.