To solve the inequality \( x + 10.5 < 20.2 \), you need to isolate \( x \).
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Subtract \( 10.5 \) from both sides: \[ x < 20.2 - 10.5 \]
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Calculate the right side: \[ 20.2 - 10.5 = 9.7 \]
So, the inequality becomes: \[ x < 9.7 \]
To write it with \( x \) first: \[ x < 9.7 \]