2. Решить уравнение a) 8y = -62.4 + 5y; б) 10 - 2(3x + 5) = 4(x - 2)

a) Решим уравнение $$8y = -62.4 + 5y$$: $$8y - 5y = -62.4$$ $$3y = -62.4$$ $$y = \frac{-62.4}{3}$$ $$y = -20.8$$ **Ответ:** $$y = -20.8$$ б) Решим уравнение $$10 - 2(3x + 5) = 4(x - 2)$$: $$10 - 6x - 10 = 4x - 8$$ $$-6x = 4x - 8$$ $$-6x - 4x = -8$$ $$-10x = -8$$ $$x = \frac{-8}{-10}$$ $$x = \frac{4}{5}$$ $$x = 0.8$$ **Ответ:** $$x = 0.8$$