99 1000 | = | 17209 1000 | x | + | 1267 10000 |
| - | 17209 1000 | x | = | 1267 10000 | − | 99 1000 |
| - | 17209 1000 | x | = | 277 10000 |
| - | 277 10000 | = | 17209 1000 | x |
17209 1000 | x | = | - | 277 10000 |
| x | = | - | 277 10000 | ÷ | 17209 1000 |
| = | - | 277 10000 | × | 1000 17209 |
| = | - | 277 10 | × | 1 17209 |
| x | = | - | 277 172090 |
| x | = | - 0.00161 |