Решим уравнение:
$$8y - 3 - (5 - 2y) = 4,3$$ $$8y - 3 - 5 + 2y = 4,3$$ $$10y - 8 = 4,3$$ $$10y = 4,3 + 8$$ $$10y = 12,3$$ $$y = \frac{12,3}{10}$$ $$y = 1,23$$Ответ: $$y = 1,23$$
Решим уравнение:
$$0,5y - 1 - (2y + 4) = y$$ $$0,5y - 1 - 2y - 4 = y$$ $$-1,5y - 5 = y$$ $$-1,5y - y = 5$$ $$-2,5y = 5$$ $$y = \frac{5}{-2,5}$$ $$y = -2$$Ответ: $$y = -2$$