3-х/7=x/3 решите уравнение

3 - х/7 = x/3;

- х/7 - х/3 = - 3;

- (х * 3 / 7 * 3) - (х * 7 / 3 * 7) = - 3;

- 3х/21 - 7х/21 = - 3;

- 10х/21 = - 3;

- 10х = - 3 : 1/21;

- 10х = - 3 * 21/1;

- 10х = - 63;

- х = - 63 : 10;

- х = - 6,3;

- х * (- 1) = - 6,3 : (- 1);

х = 6,3;

3 - 6,3/7 = 6,3/3;

21/7 - 6,3/7 = 6,3/3;

14,7/7 = 6,3/3;

44,1/21 = 44,1/21.