89 500 | = | 2023 10000 | x | − | 213 10000 |
| - | 2023 10000 | x | = | - | 213 10000 | − | 89 500 |
| - | 2023 10000 | x | = | - | 1993 10000 |
1993 10000 | = | 2023 10000 | x |
2023 10000 | x | = | 1993 10000 |
| x | = | 1993 10000 | ÷ | 2023 10000 |
| = | 1993 10000 | × | 10000 2023 |
| = | 1993 | × | 1 2023 |
| x | = | 1993 2023 |
| x | = | 0.985171 |