To solve the inequality \( h + 8 \leq 9 + 12 \), we first simplify the right side of the inequality:
\( 9 + 12 = 21 \)
Now the inequality becomes:
\( h + 8 \leq 21 \)
Next, we isolate \( h \) by subtracting 8 from both sides:
\( h \leq 21 - 8 \)
\( h \leq 13 \)
Therefore, the solution to the inequality is:
\( h \leq 13 \)