| ( | 142 5 | ( | 1 | + | 20 100 | ) | ) | + | ( | 5 100 | x | ) | = | x |
| 方程左边 = | 142 5 | ( | 1 | + | 20 100 | ) | + | ( | 5 100 | x | ) |
| = | 142 5 | × | 1 | + | 142 5 | × | 20 100 | + | ( | 5 100 | x | ) |
| = | 142 5 | + | 142 25 | + | ( | 5 100 | x | ) |
| = | 852 25 | + | ( | 5 100 | x | ) |
| = | 852 25 | + | 5 100 | x |
852 25 | + | 5 100 | x | = | x |
5 100 | x | − | x | = | - | 852 25 |
| - | 19 20 | x | = | - | 852 25 |
852 25 | = | 19 20 | x |
19 20 | x | = | 852 25 |
| x | = | 852 25 | ÷ | 19 20 |
| = | 852 25 | × | 20 19 |
| = | 852 5 | × | 4 19 |
| x | = | 3408 95 |
| x | = | 35.873684 |