| ( | 118 | ( | 1 | + | 15 100 | ) | ) | + | ( | 5 100 | x | ) | = | x |
| 方程左边 = | 118 | ( | 1 | + | 15 100 | ) | + | ( | 5 100 | x | ) |
| = | 118 | × | 1 | + | 118 | × | 15 100 | + | ( | 5 100 | x | ) |
| = | 118 | + | 177 10 | + | ( | 5 100 | x | ) |
| = | 1357 10 | + | ( | 5 100 | x | ) |
| = | 1357 10 | + | 5 100 | x |
1357 10 | + | 5 100 | x | = | x |
5 100 | x | − | x | = | - | 1357 10 |
| - | 19 20 | x | = | - | 1357 10 |
1357 10 | = | 19 20 | x |
19 20 | x | = | 1357 10 |
| x | = | 1357 10 | ÷ | 19 20 |
| = | 1357 10 | × | 20 19 |
| = | 1357 | × | 2 19 |
| x | = | 2714 19 |
| x | = | 142.842105 |