| x | + | ( | x | × | 87 2000 | × | 1 2 | ) | − | ( | x | ÷ | 113 100 | × | 13 100 | ) | = | 10290000 |
| 方程左边 = | x | + | x | × | 87 2000 | × | 1 2 | − | ( | x | ÷ | 113 100 | × | 13 100 | ) |
| = | x | + | x | × | 87 4000 | − | ( | x | ÷ | 113 100 | × | 13 100 | ) |
| = | 4087 4000 | x | − | ( | x | ÷ | 113 100 | × | 13 100 | ) |
| = | 4087 4000 | x | − | x | ÷ | 113 100 | × | 13 100 |
| = | 4087 4000 | x | − | x | × | 13 113 |
| = | 409831 452000 | x |
409831 452000 | x | = | 10290000 |
| x | = | 10290000 | ÷ | 409831 452000 |
| = | 10290000 | × | 452000 409831 |
| x | = | 4651080000000 409831 |