[tex] \\ 3(2x - 4) - 6(2x + 4) = 8x - 15 \\ \\ 6x - 12 - 12x - 24 = 8x - 15 \\ \\ - 6x - 36 = 8x - 15 \\ \\ - 6x - 8x = - 15 + 36 \\ \\ - 14x = 21 \\ \\ x = - \frac{14}{21} \\ \\ [/tex]
