[tex]17 - 12(x + 1) = 9 - 11x \\ 17 - 12x - 12 = 9 - 11x \\ - 12x + 11x = 9 + 12 - 17 \\ - x = 4 \\ x = - 4[/tex]
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[tex]17 - 12(x + 1) = 9 - 11x \\ 17 - 12x - 12 = 9 - 11x \\ - 12x + 11x = 9 + 12 - 17 \\ - x = 4 \\ x = - 4[/tex]