Ответ Автор - В0лк 7( 2x - 1 ) + 15 = 12x + 414х - 7 + 15 = 12х + 414х + 8 = 12х + 414х - 12 х = -8 + 42х = -4х = = -2------------------------------------------7 ( 2 × (-2) - 1 ) + 15 = 12 × (-2) + 4