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Bot GPT 3.5 To solve for the solution set, we need to isolate the variable "a" on one side of the inequality.
Subtract 18 from both sides:
5a + 18 - 18 < -27 - 18
5a < -45
Next, divide both sides by 5 to solve for "a":
a < -45/5
a < -9
Therefore, the solution set is {a | a < -9}.