| ( | 552071559 100 | − | x | ) | × | 2 5 | ÷ | 100 | = | x |
| 方程左边 = | ( | 552071559 100 | − | x | ) | × | 1 250 |
| ( | 552071559 100 | − | x | ) | × | 1 250 | = | x |
| 方程左边 = | 552071559 100 | × | 1 250 | − | x | × | 1 250 |
| = | 552071559 25000 | − | x | × | 1 250 |
552071559 25000 | − | 1 250 | x | = | x |
| - | 1 250 | x | − | x | = | - | 552071559 25000 |
| - | 251 250 | x | = | - | 552071559 25000 |
552071559 25000 | = | 251 250 | x |
251 250 | x | = | 552071559 25000 |
| x | = | 552071559 25000 | ÷ | 251 250 |
| = | 552071559 25000 | × | 250 251 |
| = | 552071559 100 | × | 1 251 |
| x | = | 552071559 25100 |
| x | = | 21994.882829 |