| x | + | ( | x | + | 0 | + | 0 | + | 0 | + | 0 | ) | × | 87 2000 | × | 1 | × | 1 | ÷ | 2 | − | x | ÷ | 113 100 | × | 13 100 | = | 6805900 |
| 方程左边 = | x | + | ( | x | + | 0 | + | 0 | + | 0 | + | 0 | ) | × | 87 4000 | − | x | × | 13 113 |
| = | 100 113 | x | + | ( | x | + | 0 | + | 0 | + | 0 | + | 0 | ) | × | 87 4000 |
100 113 | x | + | ( | x | + | 0 | + | 0 | + | 0 | + | 0 | ) | × | 87 4000 | = | 6805900 |
| 方程左边 = | 100 113 | x | + | x | × | 87 4000 | + | 0 | × | 87 4000 | + | 0 | × | 87 4000 | + | 0 | × | 87 4000 | + | 0 | × | 87 4000 |
| = | 100 113 | x | + | x | × | 87 4000 | + | 0 | + | 0 | + | 0 | + | 0 |
| = | 409831 452000 | x | + | 0 |
409831 452000 | x | = | 6805900 |
| x | = | 6805900 | ÷ | 409831 452000 |
| = | 6805900 | × | 452000 409831 |
| x | = | 3076266800000 409831 |