| X | = | 197 20 | + | ( | 600 | ÷ | 5000 | ) | + | ( | X | ( | 1 | + | 10 100 | ) | × | 1 1000 | ) |
| 方程右边 = | 197 20 | + | 600 | ÷ | 5000 | + | ( | X | ( | 1 | + | 10 100 | ) | × | 1 1000 | ) |
| = | 197 20 | + | 3 25 | + | ( | X | ( | 1 | + | 10 100 | ) | × | 1 1000 | ) |
| = | 997 100 | + | ( | X | ( | 1 | + | 10 100 | ) | × | 1 1000 | ) |
| = | 997 100 | + | X | ( | 1 | + | 10 100 | ) | × | 1 1000 |
| = | 997 100 | + | X | × | 1 | × | 1 1000 | + | X | × | 10 100 | × | 1 1000 |
| = | 997 100 | + | X | × | 1 1000 | + | X | × | 1 10000 |
| = | 997 100 | + | 11 10000 | X |
| X | = | 997 100 | + | 11 10000 | X |
| X | − | 11 10000 | X | = | 997 100 |
9989 10000 | X | = | 997 100 |
| X | = | 997 100 | ÷ | 9989 10000 |
| = | 997 100 | × | 10000 9989 |
| = | 997 | × | 100 9989 |
| X | = | 99700 9989 |
| X | = | 9.980979 |