| x | = | 100 | ÷ | ( | 1349 1000 | ÷ | 21 20 | − | 21 20 | × | 261 250 | ) |
| Multiply both sides of the equation by: | ( | 1349 1000 | ÷ | 21 20 | − | 21 20 | × | 261 250 | ) |
| x | ( | 1349 1000 | ÷ | 21 20 | − | 21 20 | × | 261 250 | ) | = | 100 |
| x | × | 1349 1000 | ÷ | 21 20 | − | x | × | 21 20 | × | 261 250 | = | 100 |
| x | × | 1349 1050 | − | x | × | 5481 5000 | = | 100 |
19799 105000 | x | = | 100 |
| x | = | 100 | ÷ | 19799 105000 |
| = | 100 | × | 105000 19799 |
| x | = | 10500000 19799 |
| x | = | 530.329815 |