Данный ответ представлен фотографией.
259 - 3x = 190
- 3x = 190 - 259
- 3x = - 69
x = 23
14x - 193 = 717
14x = 717 + 193
14x = 910
x = 65
24x + 217 = 529
24x = 529 - 217
24x = 312
x = 13
(135 - 31x) × 2 = 22
270 - 62x = 22
- 62x = 22 - 270
- 62x = - 248
x = 4
18 × (5x - 14) = 468
5x - 14 = 26
5x = 26 + 14
5x = 40
x = 8
(241 + 139) × (2x - 247) = 20140
380 × (2x - 247) = 20140
2x - 247 = 53
2x = 53 + 247
2x = 300
x = 150
3x : 43 = 3
3/43 x = 3
x = 43
