137 500 | = | - | 7 10000 | x | × | 2 | + | 147 5000 | x | + | 61 10000 |
| 方程右边 = | - | 7 5000 | x | + | 147 5000 | x | + | 61 10000 |
| = | 7 250 | x | + | 61 10000 |
137 500 | = | 7 250 | x | + | 61 10000 |
| - | 7 250 | x | = | 61 10000 | − | 137 500 |
| - | 7 250 | x | = | - | 2679 10000 |
2679 10000 | = | 7 250 | x |
7 250 | x | = | 2679 10000 |
| x | = | 2679 10000 | ÷ | 7 250 |
| = | 2679 10000 | × | 250 7 |
| = | 2679 40 | × | 1 7 |
| x | = | 2679 280 |
| x | = | 9.567857 |