3_7 * (3-5x) - 4_5 * (x-3_5) = 0

3/7 * (3 - 5 * x) - 4/5 * (x - 3/5) = 0;

Решим уравнение и найдем его корни.

3/7 * 35 * (3 - 5 * x) - 4/5 * 35 * (x - 3/5) = 0;

3 * 5 * (3 - 5 * x) - 4 * 7 * (x - 3/5) = 0;

15 * (3 - 5 * x) - 28 * (x - 3/5) = 0;

15 * 3 - 15 * 5 * x - 28 * x + 28 * 3/5 = 0;

45 - 75 * x - 28 * x + 28 * 3/5 = 0;

45 - 103 * x + 28 * 3/5 = 0;

45 * 5 - 103 * x * 5 + 28 * 3 = 0;

225 - 515 * x + 84 = 0;

309 - 515 * x = 0;

309 = 515 * x;

515 * x = 309;

x = 309/515;

Ответ: х = 309/515.