4 2/9x + 3 5/14 = 6 11/21
4 2/9x = 6 11/21 - 3 5/14
4 2/9x = 6 22/42 - 3 15/42
4 2/9x = 3 7/42
4 2/9x = 3 1/6
x = 3 1/6 : 4 2/9
x = 19/6 : 38/9
x = 19/6 * 9/38
x = 3/4
Ответ: 3/4
4 2/9x + 3 5/14 = 6 11/21
4 2/9x = 6 11/21 - 3 5/14
4 2/9x = 6 22/42 - 3 15/42
4 2/9x = 3 7/42
4 2/9x = 3 1/6
x = 3 1/6 : 4 2/9
x = 19/6 : 38/9
x = 19/6 * 9/38
x = 3/4
Ответ: 3/4