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