4. Решите уравнение: a) 2x - 3 = 1 - 5x; б) (2y - 3)5y = 10(y² – 1)

a) 2x - 3 = 1 - 5x 2x + 5x = 1 + 3 7x = 4 x = 4/7 б) (2y - 3)5y = 10(y² – 1) 10y² - 15y = 10y² - 10 -15y = -10 y = -10 / -15 y = 2/3 Ответ: a) x = 4/7; б) y = 2/3