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Answer:
[tex]x \leq -21[/tex]
Step-by-step explanation:
To solve this inequality, you simply have to isolate x by subtracting 18 from both sides of the inequality:
[tex]x + 18 \leq -3\\x + 18 - 18 \leq -3 - 18\\x \leq -21\\[/tex]
Hope this helps!