4 5 | = | 9 1000 | ( | x | + | 4 5 | ) |
| 方程右边 = | 9 1000 | x | + | 9 1000 | × | 4 5 |
| = | 9 1000 | x | + | 9 1250 |
4 5 | = | 9 1000 | x | + | 9 1250 |
| - | 9 1000 | x | = | 9 1250 | − | 4 5 |
| - | 9 1000 | x | = | - | 991 1250 |
991 1250 | = | 9 1000 | x |
9 1000 | x | = | 991 1250 |
| x | = | 991 1250 | ÷ | 9 1000 |
| = | 991 1250 | × | 1000 9 |
| = | 991 5 | × | 4 9 |
| x | = | 3964 45 |
| x | = | 88.088889 |