| ( | 49 5 | ( | 1 | + | 20 100 | ) | ) | + | ( | 5 100 | x | ) | = | x |
| 方程左边 = | 49 5 | ( | 1 | + | 20 100 | ) | + | ( | 5 100 | x | ) |
| = | 49 5 | × | 1 | + | 49 5 | × | 20 100 | + | ( | 5 100 | x | ) |
| = | 49 5 | + | 49 25 | + | ( | 5 100 | x | ) |
| = | 294 25 | + | ( | 5 100 | x | ) |
| = | 294 25 | + | 5 100 | x |
294 25 | + | 5 100 | x | = | x |
5 100 | x | − | x | = | - | 294 25 |
| - | 19 20 | x | = | - | 294 25 |
294 25 | = | 19 20 | x |
19 20 | x | = | 294 25 |
| x | = | 294 25 | ÷ | 19 20 |
| = | 294 25 | × | 20 19 |
| = | 294 5 | × | 4 19 |
| x | = | 1176 95 |
| x | = | 12.378947 |