| ( | X | × | 145 | ) | × | 1371311 25000000 | + | X | × | 145 | = | 99413 25 |
| 方程左边 = | X | × | 145 | × | 1371311 25000000 | + | 145 | X |
| = | X | × | 39768019 5000000 | + | 145 | X |
| = | 764768019 5000000 | X |
764768019 5000000 | X | = | 99413 25 |
| X | = | 99413 25 | ÷ | 764768019 5000000 |
| = | 99413 25 | × | 5000000 764768019 |
| = | 99413 | × | 200000 764768019 |
| X | = | 19882600000 764768019 |