(4а - 5)(2а + 3) = 8а² + 12а - 10а - 15 = 8а² + 2а - 15,
(8х + 10)(3 - х) = (11 - 2х)(4х + 5) - 5,
24х - 8х² + 30 - 10х = 44х + 55 - 8х² - 10х - 5,
24х + 30 = 44х + 55 - 5,
44х - 24х = 30 - 55 + 5,
20х = -20,
х = -1
(4а - 5)(2а + 3) = 8а² + 12а - 10а - 15 = 8а² + 2а - 15,
(8х + 10)(3 - х) = (11 - 2х)(4х + 5) - 5,
24х - 8х² + 30 - 10х = 44х + 55 - 8х² - 10х - 5,
24х + 30 = 44х + 55 - 5,
44х - 24х = 30 - 55 + 5,
20х = -20,
х = -1