Решим уравнение:
$$16 + 6x = 5(1 - 2x) - 13$$$$16 + 6x = 5 - 10x - 13$$$$16 + 6x = -10x - 8$$$$6x + 10x = -8 - 16$$$$16x = -24$$$$x = -\frac{24}{16}$$$$x = -\frac{3}{2}$$$$x = -1,5$$
Ответ: -1,5