| ( | 6557 100 | ( | 1 | + | 20 100 | ) | ) | + | ( | 7 100 | x | ) | = | x |
| 方程左边 = | 6557 100 | ( | 1 | + | 20 100 | ) | + | ( | 7 100 | x | ) |
| = | 6557 100 | × | 1 | + | 6557 100 | × | 20 100 | + | ( | 7 100 | x | ) |
| = | 6557 100 | + | 6557 500 | + | ( | 7 100 | x | ) |
| = | 19671 250 | + | ( | 7 100 | x | ) |
| = | 19671 250 | + | 7 100 | x |
19671 250 | + | 7 100 | x | = | x |
7 100 | x | − | x | = | - | 19671 250 |
| - | 93 100 | x | = | - | 19671 250 |
19671 250 | = | 93 100 | x |
93 100 | x | = | 19671 250 |
| x | = | 19671 250 | ÷ | 93 100 |
| = | 19671 250 | × | 100 93 |
| = | 6557 5 | × | 2 31 |
| x | = | 13114 155 |
| x | = | 84.606452 |