| ( | 35 | ( | 1 | + | 20 100 | ) | ) | + | ( | 5 100 | x | ) | = | x |
| 方程左边 = | 35 | ( | 1 | + | 20 100 | ) | + | ( | 5 100 | x | ) |
| = | 35 | × | 1 | + | 35 | × | 20 100 | + | ( | 5 100 | x | ) |
| = | 35 | + | 7 | + | ( | 5 100 | x | ) |
| = | 42 | + | ( | 5 100 | x | ) |
| = | 42 | + | 5 100 | x |
| 42 | + | 5 100 | x | = | x |
5 100 | x | − | x | = | - | 42 |
| - | 19 20 | x | = | - | 42 |
| 42 | = | 19 20 | x |
19 20 | x | = | 42 |
| x | = | 42 | ÷ | 19 20 |
| = | 42 | × | 20 19 |
| x | = | 840 19 |
| x | = | 44.210526 |