13957 5 | = | ( | 109 | − | x | ) | × | 299 10 | + | 199 10 | x |
| 方程右边 = | 109 | × | 299 10 | − | x | × | 299 10 | + | 199 10 | x |
| = | 32591 10 | − | x | × | 299 10 | + | 199 10 | x |
| = | 32591 10 | − | 10 | x |
13957 5 | = | 32591 10 | − | 10 | x |
| 10 | x | = | 32591 10 | − | 13957 5 |
| 10 | x | = | 4677 10 |
| x | = | 4677 10 | ÷ | 10 |
| = | 4677 10 | × | 1 10 |
| x | = | 4677 100 |
| x | = | 46.77 |