g)
Решим уравнение:
$$5x - 3x = 5x + 4$$
$$2x = 5x + 4$$
$$2x - 5x = 4$$
$$-3x = 4$$
$$x = -\frac{4}{3}$$
$$x = -1\frac{1}{3}$$
Ответ: $$-1\frac{1}{3}$$