| ( | 6521 20 | ( | 1 | + | 20 100 | ) | ) | + | ( | 8 100 | x | ) | = | x |
| Left side of the equation = | 6521 20 | ( | 1 | + | 20 100 | ) | + | ( | 8 100 | x | ) |
| = | 6521 20 | × | 1 | + | 6521 20 | × | 20 100 | + | ( | 8 100 | x | ) |
| = | 6521 20 | + | 6521 100 | + | ( | 8 100 | x | ) |
| = | 19563 50 | + | ( | 8 100 | x | ) |
| = | 19563 50 | + | 8 100 | x |
19563 50 | + | 8 100 | x | = | x |
8 100 | x | − | x | = | - | 19563 50 |
| - | 23 25 | x | = | - | 19563 50 |
19563 50 | = | 23 25 | x |
23 25 | x | = | 19563 50 |
| x | = | 19563 50 | ÷ | 23 25 |
| = | 19563 50 | × | 25 23 |
| = | 19563 2 | × | 1 23 |
| x | = | 19563 46 |
| x | = | 425.282609 |