1) 6x + 8x - 7x = 714
14x - 7x = 714
7x = 714 |:7
x = 102
Ответ: 102
2) 23x - 19x + 5x = 1827
4x + 5x = 1827
9x = 1827. |:9
x = 203
Ответ: 203
3) 11x - 6x + 17 = 2042
5x + 17 = 2042
5x = 2042 - 17
5x = 2025 |:5
x = 405
Ответ: 405
4) 5x + 3x - 47 = 6401
8x - 47 = 6401
8x = 6401 + 47
8x = 6448. |:8
x = 806
Ответ: 806