| ( | ( | x | − | 140 | − | 40 | ) | × | 3 4 | ) | ÷ | 1610 | = | ( | ( | x | − | 140 | − | 150 | ) | × | 3 4 | ) | ÷ | 1410 |
| 方程左边 = | ( | x | − | 140 | − | 40 | ) | × | 3 4 | × | 1 1610 |
| = | ( | x | − | 140 | − | 40 | ) | × | 3 6440 |
| = | x | × | 3 6440 | − | 140 | × | 3 6440 | − | 40 | × | 3 6440 |
| = | x | × | 3 6440 | − | 3 46 | − | 3 161 |
| = | 3 6440 | x | − | 27 322 |
3 6440 | x | − | 27 322 | = | ( | ( | x | − | 140 | − | 150 | ) | × | 3 4 | ) | ÷ | 1410 |
| 方程右边 = | ( | x | − | 140 | − | 150 | ) | × | 3 4 | × | 1 1410 |
| = | ( | x | − | 140 | − | 150 | ) | × | 1 1880 |
| = | x | × | 1 1880 | − | 140 | × | 1 1880 | − | 150 | × | 1 1880 |
| = | x | × | 1 1880 | − | 7 94 | − | 15 188 |
| = | 1 1880 | x | − | 1363 8836 |
3 6440 | x | − | 27 322 | = | 1 1880 | x | − | 1363 8836 |
3 6440 | x | − | 1 1880 | x | = | - | 1363 8836 | + | 27 322 |
| - | 1 15134 | x | = | - | 1363 8836 | + | 27 322 |
| - | 1 15134 | x | = | - | 2131 30268 |
2131 30268 | = | 1 15134 | x |
1 15134 | x | = | 2131 30268 |
| x | = | 2131 30268 | ÷ | 1 15134 |
| = | 2131 30268 | × | 15134 |
| = | 2131 2 | × | 1 |
| x | = | 2131 2 |
| x | = | 1065.5 |