е) $$ 5 - \frac{1 - 2x}{4} = \frac{3x + 20}{6} + \frac{x}{3} $$
Приведем дроби к общему знаменателю 12:
$$ \frac{60 - 3(1 - 2x)}{12} = \frac{2(3x + 20) + 4x}{12} $$
$$ 60 - 3 + 6x = 6x + 40 + 4x $$
$$ 57 + 6x = 10x + 40 $$
$$ 4x = 17 $$
$$ x = \frac{17}{4} = 4.25 $$
Ответ: 4.25