Final answer:
To find the inequality, add 78 to both sides of x - 78 > 300, resulting in x > 378.
Step-by-step explanation:
To find the inequality, we need to isolate the variable x.
Given the inequality x - 78 > 300, we can start by adding 78 to both sides of the inequality:
x - 78 + 78 > 300 + 78.
Simplifying this, we get x > 378.
Therefore, the inequality is x > 378.