| 100 | X | − | ( | 580 | + | 4 | × | 100 | ) | − | ( | 100 | X | × | 13 100 | − | 5 | × | 100 | ) | × | 3 25 | = | 0 |
| 方程左边 = | 100 | X | − | 580 | − | 4 | × | 100 | − | ( | 100 | X | × | 13 100 | − | 5 | × | 100 | ) | × | 3 25 |
| = | 100 | X | − | 580 | − | 400 | − | ( | 100 | X | × | 13 100 | − | 5 | × | 100 | ) | × | 3 25 |
| = | 100 | X | − | 980 | − | ( | 100 | X | × | 13 100 | − | 5 | × | 100 | ) | × | 3 25 |
| = | 100 | X | − | 980 | − | 100 | X | × | 13 100 | × | 3 25 | + | 5 | × | 100 | × | 3 25 |
| = | 100 | X | − | 980 | − | 39 25 | X | + | 60 |
| = | 2461 25 | X | − | 920 |
2461 25 | X | − | 920 | = | 0 |
2461 25 | X | = | 0 | + | 920 |
2461 25 | X | = | 920 |
| X | = | 920 | ÷ | 2461 25 |
| = | 920 | × | 25 2461 |
| = | 40 | × | 25 107 |
| X | = | 1000 107 |
| X | = | 9.345794 |