| ( | 693 50 | ( | 1 | + | 15 100 | ) | ) | + | ( | 5 100 | x | ) | = | x |
| 方程左边 = | 693 50 | ( | 1 | + | 15 100 | ) | + | ( | 5 100 | x | ) |
| = | 693 50 | × | 1 | + | 693 50 | × | 15 100 | + | ( | 5 100 | x | ) |
| = | 693 50 | + | 2079 1000 | + | ( | 5 100 | x | ) |
| = | 15939 1000 | + | ( | 5 100 | x | ) |
| = | 15939 1000 | + | 5 100 | x |
15939 1000 | + | 5 100 | x | = | x |
5 100 | x | − | x | = | - | 15939 1000 |
| - | 19 20 | x | = | - | 15939 1000 |
15939 1000 | = | 19 20 | x |
19 20 | x | = | 15939 1000 |
| x | = | 15939 1000 | ÷ | 19 20 |
| = | 15939 1000 | × | 20 19 |
| = | 15939 50 | × | 1 19 |
| x | = | 15939 950 |
| x | = | 16.777895 |