| ( | 117 4 | ( | 1 | + | 20 100 | ) | ) | + | ( | 5 100 | x | ) | = | x |
| 方程左边 = | 117 4 | ( | 1 | + | 20 100 | ) | + | ( | 5 100 | x | ) |
| = | 117 4 | × | 1 | + | 117 4 | × | 20 100 | + | ( | 5 100 | x | ) |
| = | 117 4 | + | 117 20 | + | ( | 5 100 | x | ) |
| = | 351 10 | + | ( | 5 100 | x | ) |
| = | 351 10 | + | 5 100 | x |
351 10 | + | 5 100 | x | = | x |
5 100 | x | − | x | = | - | 351 10 |
| - | 19 20 | x | = | - | 351 10 |
351 10 | = | 19 20 | x |
19 20 | x | = | 351 10 |
| x | = | 351 10 | ÷ | 19 20 |
| = | 351 10 | × | 20 19 |
| = | 351 | × | 2 19 |
| x | = | 702 19 |
| x | = | 36.947368 |