2*(0.2-0.02/(0.002+0.0002x))=3

0.2 - 0.02 / (0.002 + 0.0002x) = 3 : 2;0.2 - 0.02 / (0.002 + 0.0002x) = 1.5;0.02 / (0.002 + 0.0002x) = 0.2 - 1.5;0.02 / (0.002 + 0.0002x) = -1.3;0.002 + 0.0002x = 0.02 : (-1.3);0.002 + 0.0002x = 0.015;0.0002x = 0.015 - 0.002;0.0002x = 0.013;х = 0.013 : 0.0002;х = 65.Ответ: 65.