Ответ:1.2z - 2.52 = 1.3z - 2.08 - 0.521.2z - 2.52 = 1.3z - 2.62.6 - 2.52 = 1.3z - 1.2z0.08 = 0.1zz = 0.08 / 0.1 = 0.8