| ( | ( | x | − | 140 | − | 40 | ) | × | 3 4 | ) | ÷ | 1610 | = | ( | ( | x | − | 140 | − | 345 | − | 30 | ) | × | 3 4 | ) | ÷ | 1210 |
| 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 | − | 345 | − | 30 | ) | × | 3 4 | ) | ÷ | 1210 |
| 方程右边 = | ( | x | − | 140 | − | 345 | − | 30 | ) | × | 3 4 | × | 1 1210 |
| = | ( | x | − | 140 | − | 345 | − | 30 | ) | × | 3 4840 |
| = | x | × | 3 4840 | − | 140 | × | 3 4840 | − | 345 | × | 3 4840 | − | 30 | × | 3 4840 |
| = | x | × | 3 4840 | − | 21 242 | − | 207 968 | − | 9 484 |
| = | 3 4840 | x | − | 309 968 |
3 6440 | x | − | 27 322 | = | 3 4840 | x | − | 309 968 |
3 6440 | x | − | 3 4840 | x | = | - | 309 968 | + | 27 322 |
| - | 3 19481 | x | = | - | 309 968 | + | 27 322 |
| - | 3 19481 | x | = | - | 36681 155848 |
36681 155848 | = | 3 19481 | x |
3 19481 | x | = | 36681 155848 |
| x | = | 36681 155848 | ÷ | 3 19481 |
| = | 36681 155848 | × | 19481 3 |
| = | 12227 8 | × | 1 |
| x | = | 12227 8 |
| x | = | 1528.375 |