[tex]3 - x = 3(x + 5) \\ - x = 3x + 15 - 3 \\ - x = 3x + 12 \\ - x - 3x = 12 \\ - 4x = 12 \\ x = - \frac{12}{4} \\ x = - 3[/tex]
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[tex]3 - x = 3(x + 5) \\ - x = 3x + 15 - 3 \\ - x = 3x + 12 \\ - x - 3x = 12 \\ - 4x = 12 \\ x = - \frac{12}{4} \\ x = - 3[/tex]
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