| X | ÷ | 200 | = | X | + | 200 | ÷ | 3 5 | × | 4 |
| Right side of the equation = | X | + | 4000 3 |
1 200 | X | = | X | + | 4000 3 |
1 200 | X | − | X | = | 4000 3 |
| - | 199 200 | X | = | 4000 3 |
| - | 4000 3 | = | 199 200 | X |
199 200 | X | = | - | 4000 3 |
| X | = | - | 4000 3 | ÷ | 199 200 |
| = | - | 4000 3 | × | 200 199 |
| X | = | - | 800000 597 |
| X | = | - 1340.033501 |