To solve the inequality \( 5x < 12 \), we need to isolate \( x \).
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Divide both sides of the inequality by 5: \[ x < \frac{12}{5} \]
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Now convert \( \frac{12}{5} \) into a mixed number:
- Divide 12 by 5, which gives 2 with a remainder of 2.
- Therefore, \( \frac{12}{5} = 2 \frac{2}{5} \).
Thus, the solution to the inequality can be written as: \[ x < 2 \frac{2}{5} \]
So the final answer is: \[ x < 2 \frac{2}{5} \]