To solve the inequality \(-3x > 18\), we need to isolate \(x\) by dividing both sides of the inequality by \(-3\). Remember that dividing or multiplying both sides of an inequality by a negative number reverses the inequality sign.
Step 1: Solve the Inequality
We start with the inequality:
\[
-3x > 18
\]
To isolate \(x\), we divide both sides by \(-3\). Remember that dividing by a negative number reverses the inequality sign:
\[
x < \frac{18}{-3}
\]
Step 2: Simplify the Expression
Now, we simplify the right side:
\[
x < -6
\]
Final Answer
The solution to the inequality is:
\[
\boxed{x < -6}
\]