To solve the inequality \( 7x + 9 < 58 \), follow these steps:
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Subtract 9 from both sides: \[ 7x < 58 - 9 \] \[ 7x < 49 \]
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Divide both sides by 7: \[ x < \frac{49}{7} \] \[ x < 7 \]
So the solution to the inequality is: \[ x < 7 \]
Thus, the answer is \( x < 7 \) (x less than 7).