| ( | X | − | 700 | ) | − | X | × | 37 1000 | ÷ | 12 | − | ( | X | + | 700 | ) | × | 3 | ÷ | 10000 | − | ( | X | − | 700 | ) | × | 13 100 | × | 3 25 | = | 0 |
| 方程左边 = | ( | X | − | 700 | ) | − | X | × | 37 12000 | − | ( | X | + | 700 | ) | × | 3 10000 | − | ( | X | − | 700 | ) | × | 39 2500 |
| ( | X | − | 700 | ) | − | 37 12000 | X | − | ( | X | + | 700 | ) | × | 3 10000 | − | ( | X | − | 700 | ) | × | 39 2500 | = | 0 |
| 方程左边 = | X | − | 700 | − | 37 12000 | X | − | ( | X | + | 700 | ) | × | 3 10000 | − | ( | X | − | 700 | ) | × | 39 2500 |
| = | 11963 12000 | X | − | 700 | − | ( | X | + | 700 | ) | × | 3 10000 | − | ( | X | − | 700 | ) | × | 39 2500 |
| = | 11963 12000 | X | − | 700 | − | X | × | 3 10000 | − | 700 | × | 3 10000 | − | ( | X | − | 700 | ) | × | 39 2500 |
| = | 11963 12000 | X | − | 700 | − | X | × | 3 10000 | − | 21 100 | − | ( | X | − | 700 | ) | × | 39 2500 |
| = | 59797 60000 | X | − | 70021 100 | − | ( | X | − | 700 | ) | × | 39 2500 |
| = | 59797 60000 | X | − | 70021 100 | − | X | × | 39 2500 | + | 700 | × | 39 2500 |
| = | 59797 60000 | X | − | 70021 100 | − | X | × | 39 2500 | + | 273 25 |
| = | 58861 60000 | X | − | 68929 100 |
58861 60000 | X | − | 68929 100 | = | 0 |
58861 60000 | X | = | 0 | + | 68929 100 |
58861 60000 | X | = | 68929 100 |
| X | = | 68929 100 | ÷ | 58861 60000 |
| = | 68929 100 | × | 60000 58861 |
| = | 68929 | × | 600 58861 |
| X | = | 41357400 58861 |
| X | = | 702.628226 |