| ( | 3578 | − | X | ) | × | 3 500 | = | 348753 100 |
| Left side of the equation = | 3578 | × | 3 500 | − | X | × | 3 500 |
| = | 5367 250 | − | X | × | 3 500 |
5367 250 | − | 3 500 | X | = | 348753 100 |
| - | 3 500 | X | = | 348753 100 | − | 5367 250 |
| - | 3 500 | X | = | 1733031 500 |
| - | 1733031 500 | = | 3 500 | X |
3 500 | X | = | - | 1733031 500 |
| X | = | - | 1733031 500 | ÷ | 3 500 |
| = | - | 1733031 500 | × | 500 3 |
| = | - | 577677 | × | 1 |
| X | = | - | 577677 |