Решите уравнение 2/3 (4,2 - 9,6x) = 2,8 (2/7 - 1/2x)

2/3 * (4,2 - 9,6 * x) = 2,8 * (2/7 - 1/2 * x);

2/3 * 42/10 - 2/3 * 96/10 * x = 28/10 * 2/7 - 28/10 * 1/2 * x;

(2 * 42) / 30 - (2 * 96) / 30 * x = (2 * 28) / 70 - 28/20 * x;

14/5 - 32/5 * x = 4/5 - 7/5 * x;

32/5 * х - 7/5 * х = 14/5 - 4/5;

(32 - 7) / 5 * х = (14 - 4) / 5;

25/5 * х = 10/5;

5 * х = 2;

х = 2/5.