To solve the inequality \(5x + 12.5 < 23.1\), we first isolate \(x\).
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Subtract \(12.5\) from both sides of the inequality: \[ 5x < 23.1 - 12.5 \] \[ 5x < 10.6 \]
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Next, divide both sides by \(5\): \[ x < \frac{10.6}{5} \] \[ x < 2.12 \]
So the solution to the inequality can be written as: \[ x < 2.12 \]
In summary, the final answer with \(x\) coming first is: \[ x < 2.12 \]