3 20 | = | 33 100 | x | × | 33 10000000 |
| 方程右边 = | 1089 1000000000 | x |
3 20 | = | 1089 1000000000 | x |
| - | 1089 1000000000 | x | = | - | 3 20 |
3 20 | = | 1089 1000000000 | x |
1089 1000000000 | x | = | 3 20 |
| x | = | 3 20 | ÷ | 1089 1000000000 |
| = | 3 20 | × | 1000000000 1089 |
| = | 1 | × | 50000000 363 |
| x | = | 50000000 363 |
| x | = | 137741.046832 |