| ( | X | − | X | × | 3 5 | × | 203 1000 | − | 5000 | ) | × | 7 100 | = | 1000 |
| 方程左边 = | X | × | 7 100 | − | X | × | 3 5 | × | 203 1000 | × | 7 100 | − | 5000 | × | 7 100 |
| = | X | × | 7 100 | − | X | × | 4263 500000 | − | 350 |
| = | 30737 500000 | X | − | 350 |
30737 500000 | X | − | 350 | = | 1000 |
30737 500000 | X | = | 1000 | + | 350 |
30737 500000 | X | = | 1350 |
| X | = | 1350 | ÷ | 30737 500000 |
| = | 1350 | × | 500000 30737 |
| X | = | 675000000 30737 |
| X | = | 21960.503628 |