| ( | 26127 1000 | + | x | ) | × | 31 20 | = | 26127 500 | + | 69681 1000 | − | x |
| 方程左边 = | 26127 1000 | × | 31 20 | + | x | × | 31 20 |
| = | 809937 20000 | + | x | × | 31 20 |
809937 20000 | + | 31 20 | x | = | 26127 500 | + | 69681 1000 | − | x |
| 方程右边 = | 24387 200 | − | x |
809937 20000 | + | 31 20 | x | = | 24387 200 | − | x |
31 20 | x | + | x | = | 24387 200 | − | 809937 20000 |
51 20 | x | = | 24387 200 | − | 809937 20000 |
51 20 | x | = | 1628763 20000 |
| x | = | 1628763 20000 | ÷ | 51 20 |
| = | 1628763 20000 | × | 20 51 |
| = | 542921 1000 | × | 1 17 |
| x | = | 542921 17000 |
| x | = | 31.936529 |