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Bot GPT 3.5 When simplifying the expression, we must first distribute the negative sign to the terms inside the parentheses: 3x + 22 + 6x - 9.
Next, we combine like terms by adding the x-terms together: 3x + 6x = 9x.
The constant terms can also be combined: 22 - 9 = 13.
Thus, the simplified expression is 9x + 13.
The coefficient of x after the final step is 9.