| ( | 26253 1000 | + | x | ) | × | 31 20 | = | 26153 500 | + | 69859 1000 | − | x |
| 方程左边 = | 26253 1000 | × | 31 20 | + | x | × | 31 20 |
| = | 813843 20000 | + | x | × | 31 20 |
813843 20000 | + | 31 20 | x | = | 26153 500 | + | 69859 1000 | − | x |
| 方程右边 = | 24433 200 | − | x |
813843 20000 | + | 31 20 | x | = | 24433 200 | − | x |
31 20 | x | + | x | = | 24433 200 | − | 813843 20000 |
51 20 | x | = | 24433 200 | − | 813843 20000 |
51 20 | x | = | 1629457 20000 |
| x | = | 1629457 20000 | ÷ | 51 20 |
| = | 1629457 20000 | × | 20 51 |
| = | 1629457 1000 | × | 1 51 |
| x | = | 1629457 51000 |
| x | = | 31.950137 |