| x | ÷ | ( | 583 20 | + | x | ) | = | 621 25000 |
| 方程两边同时乘以: | ( | 583 20 | + | x | ) |
| x | = | 621 25000 | ( | 583 20 | + | x | ) |
| x | = | 621 25000 | × | 583 20 | + | 621 25000 | x |
| x | = | 362043 500000 | + | 621 25000 | x |
| x | − | 621 25000 | x | = | 362043 500000 |
24379 25000 | x | = | 362043 500000 |
| x | = | 362043 500000 | ÷ | 24379 25000 |
| = | 362043 500000 | × | 25000 24379 |
| = | 362043 20 | × | 1 24379 |
| x | = | 362043 487580 |
| x | = | 0.74253 |