| 400000 | = | 7 10 | × | 171 100 | × | 400 | × | 765 | + | 360 | ( | 4 | × | 157 2 | ÷ | x | ) | × | 765 |
| 400000 | = | 7 10 | × | 171 100 | × | 400 | × | 765 | + | 360 | × | 4 | × | 157 2 | ÷ | x | × | 765 |
| 400000 | = | 366282 | + | 86475600 | ÷ | x |
| 方程两边同时乘以: | x |
| 400000 | x | = | 366282 | x | + | 86475600 |
| 400000 | x | − | 366282 | x | = | 86475600 |
| 33718 | x | = | 86475600 |
| x | = | 86475600 | ÷ | 33718 |
| = | 86475600 | × | 1 33718 |
| = | 43237800 | × | 1 16859 |
| x | = | 43237800 16859 |
| x | = | 2564.671689 |