1293 2000 | X | + | 5491371 100 | = | 14223 20000 | X |
1293 2000 | X | − | 14223 20000 | X | = | - | 5491371 100 |
| - | 1293 20000 | X | = | - | 5491371 100 |
5491371 100 | = | 1293 20000 | X |
1293 20000 | X | = | 5491371 100 |
| X | = | 5491371 100 | ÷ | 1293 20000 |
| = | 5491371 100 | × | 20000 1293 |
| = | 1830457 | × | 200 431 |
| X | = | 366091400 431 |
| X | = | 849400 |