| ( | x | × | 6 5 | × | 9 10 | − | x | ) | + | ( | 2000 | − | x | ) | × | 23 20 | × | 9 10 | − | ( | 2000 | − | x | ) | = | 131 |
| 方程左边 = | ( | x | × | 6 5 | × | 9 10 | − | x | ) | + | ( | 2000 | − | x | ) | × | 207 200 | − | ( | 2000 | − | x | ) |
| ( | x | × | 6 5 | × | 9 10 | − | x | ) | + | ( | 2000 | − | x | ) | × | 207 200 | − | ( | 2000 | − | x | ) | = | 131 |
| 方程左边 = | x | × | 6 5 | × | 9 10 | − | x | + | ( | 2000 | − | x | ) | × | 207 200 | − | ( | 2000 | − | x | ) |
| = | x | × | 27 25 | − | x | + | ( | 2000 | − | x | ) | × | 207 200 | − | ( | 2000 | − | x | ) |
| = | 2 25 | x | + | ( | 2000 | − | x | ) | × | 207 200 | − | ( | 2000 | − | x | ) |
| = | 2 25 | x | + | 2000 | × | 207 200 | − | x | × | 207 200 | − | ( | 2000 | − | x | ) |
| = | 2 25 | x | + | 2070 | − | x | × | 207 200 | − | ( | 2000 | − | x | ) |
| = | - | 191 200 | x | + | 2070 | − | ( | 2000 | − | x | ) |
| = | - | 191 200 | x | + | 2070 | − | 2000 | + | x |
| = | 9 200 | x | + | 70 |
9 200 | x | + | 70 | = | 131 |
9 200 | x | = | 131 | − | 70 |
9 200 | x | = | 61 |
| x | = | 61 | ÷ | 9 200 |
| = | 61 | × | 200 9 |
| x | = | 12200 9 |
| x | = | 1355.555556 |