| ( | 600 | + | 500 | + | 40 | + | 20 | ) | × | 6 5 | + | 30 | + | 13 200 | v | = | v |
| 方程左边 = | 600 | × | 6 5 | + | 500 | × | 6 5 | + | 40 | × | 6 5 | + | 20 | × | 6 5 | + | 30 | + | 13 200 | v |
| = | 720 | + | 600 | + | 48 | + | 24 | + | 30 | + | 13 200 | v |
| = | 1422 | + | 13 200 | v |
| 1422 | + | 13 200 | v | = | v |
13 200 | v | − | v | = | - | 1422 |
| - | 187 200 | v | = | - | 1422 |
| 1422 | = | 187 200 | v |
187 200 | v | = | 1422 |
| v | = | 1422 | ÷ | 187 200 |
| = | 1422 | × | 200 187 |
| v | = | 284400 187 |
| v | = | 1520.855615 |