To solve the inequality \( x + 10.5 < 20.2 \), we first isolate \( x \) by subtracting \( 10.5 \) from both sides:
\[ x < 20.2 - 10.5 \]
Calculating the right side:
\[ 20.2 - 10.5 = 9.7 \]
So, the inequality can be rewritten as:
\[ x < 9.7 \]
To write the inequality with \( x \) coming first:
\[ x < 9.7 \]
This expresses the solution clearly with \( x \) on the left.