| ( | X | + | ( | X | ÷ | 25 | ) | × | 3600 | ( | 49 10 | + | 29 10 | + | 19 10 | ) | + | 2 25 | X | + | 39 500 | X | ) | × | 113 100 | = | 0 |
| 方程左边 = | X | × | 113 100 | + | ( | X | ÷ | 25 | ) | × | 3600 | ( | 49 10 | + | 29 10 | + | 19 10 | ) | × | 113 100 | + | 2 25 | X | × | 113 100 | + | 39 500 | X | × | 113 100 |
| = | X | × | 113 100 | + | ( | X | ÷ | 25 | ) | × | 4068 | ( | 49 10 | + | 29 10 | + | 19 10 | ) | + | 113 1250 | X | + | 4407 50000 | X |
| = | 65427 50000 | X | + | ( | X | ÷ | 25 | ) | × | 4068 | ( | 49 10 | + | 29 10 | + | 19 10 | ) |
| = | 65427 50000 | X | + | X | ÷ | 25 | × | 4068 | ( | 49 10 | + | 29 10 | + | 19 10 | ) |
| = | 65427 50000 | X | + | X | × | 4068 25 | ( | 49 10 | + | 29 10 | + | 19 10 | ) |
| = | 65427 50000 | X | + | X | × | 4068 25 | × | 49 10 | + | X | × | 4068 25 | × | 29 10 | + | X | × | 4068 25 | × | 19 10 |
| = | 65427 50000 | X | + | X | × | 99666 125 | + | X | × | 58986 125 | + | X | × | 38646 125 |
| = | 78984627 50000 | X |
78984627 50000 | X | = | 0 |
| X | = | 0 | ÷ | 78984627 50000 |
| = | 0 | × | 50000 78984627 |
| X | = | 0 |