| ( | x | × | 321 100 | ) | ÷ | 321 100 | + | ( | x | × | 321 100 | ) | = | 5090 |
| Left side of the equation = | x | × | 321 100 | × | 100 321 | + | ( | x | × | 321 100 | ) |
| = | x | × | 1 | + | ( | x | × | 321 100 | ) |
| = | 1 | x | + | x | × | 321 100 |
| = | 421 100 | x |
421 100 | x | = | 5090 |
| x | = | 5090 | ÷ | 421 100 |
| = | 5090 | × | 100 421 |
| x | = | 509000 421 |
| x | = | 1209.026128 |