| ( | 632 | ( | 1 | + | 20 100 | ) | ) | + | ( | 7 100 | x | ) | = | x |
| 方程左边 = | 632 | ( | 1 | + | 20 100 | ) | + | ( | 7 100 | x | ) |
| = | 632 | × | 1 | + | 632 | × | 20 100 | + | ( | 7 100 | x | ) |
| = | 632 | + | 632 5 | + | ( | 7 100 | x | ) |
| = | 3792 5 | + | ( | 7 100 | x | ) |
| = | 3792 5 | + | 7 100 | x |
3792 5 | + | 7 100 | x | = | x |
7 100 | x | − | x | = | - | 3792 5 |
| - | 93 100 | x | = | - | 3792 5 |
3792 5 | = | 93 100 | x |
93 100 | x | = | 3792 5 |
| x | = | 3792 5 | ÷ | 93 100 |
| = | 3792 5 | × | 100 93 |
| = | 1264 | × | 20 31 |
| x | = | 25280 31 |
| x | = | 815.483871 |