| x | × | 1 2 | × | 3500 | × | 31 | = | 31 | × | 20000 | + | 1 2 | x | × | 20 | × | 31 | + | 64000 | + | 14 | × | 2000 |
| 方程左边 = | x | × | 54250 |
| 54250 | x | = | 31 | × | 20000 | + | 1 2 | x | × | 20 | × | 31 | + | 64000 | + | 14 | × | 2000 |
| 方程右边 = | 620000 | + | 310 | x | + | 64000 | + | 28000 |
| = | 712000 | + | 310 | x |
| 54250 | x | = | 712000 | + | 310 | x |
| 54250 | x | − | 310 | x | = | 712000 |
| 53940 | x | = | 712000 |
| x | = | 712000 | ÷ | 53940 |
| = | 712000 | × | 1 53940 |
| = | 35600 | × | 1 2697 |
| x | = | 35600 2697 |
| x | = | 13.199852 |