| ( | 25759 1000 | + | x | ) | × | 47 20 | = | 51519 1000 | + | 34789 500 | − | x |
| 方程左边 = | 25759 1000 | × | 47 20 | + | x | × | 47 20 |
| = | 1210673 20000 | + | x | × | 47 20 |
1210673 20000 | + | 47 20 | x | = | 51519 1000 | + | 34789 500 | − | x |
| 方程右边 = | 121097 1000 | − | x |
1210673 20000 | + | 47 20 | x | = | 121097 1000 | − | x |
47 20 | x | + | x | = | 121097 1000 | − | 1210673 20000 |
67 20 | x | = | 121097 1000 | − | 1210673 20000 |
67 20 | x | = | 1211267 20000 |
| x | = | 1211267 20000 | ÷ | 67 20 |
| = | 1211267 20000 | × | 20 67 |
| = | 1211267 1000 | × | 1 67 |
| x | = | 1211267 67000 |
| x | = | 18.078612 |