| 20539511 | + | 3000 | x | = | ( | 7627 | + | x | ) | × | 2900 |
| 方程右边 = | 7627 | × | 2900 | + | x | × | 2900 |
| = | 22118300 | + | x | × | 2900 |
| 20539511 | + | 3000 | x | = | 22118300 | + | 2900 | x |
| 3000 | x | − | 2900 | x | = | 22118300 | − | 20539511 |
| 100 | x | = | 22118300 | − | 20539511 |
| 100 | x | = | 1578789 |
| x | = | 1578789 | ÷ | 100 |
| = | 1578789 | × | 1 100 |
| x | = | 1578789 100 |
| x | = | 15787.89 |