| 100 | x | + | 80 | × | 80 | ( | 6 | − | x | ) | = | 610203 50 |
| Left side of the equation = | 100 | x | + | 6400 | ( | 6 | − | x | ) |
| 100 | x | + | 6400 | ( | 6 | − | x | ) | = | 610203 50 |
| Left side of the equation = | 100 | x | + | 6400 | × | 6 | − | 6400 | x |
| = | 100 | x | + | 38400 | − | 6400 | x |
| = | - | 6300 | x | + | 38400 |
| - | 6300 | x | + | 38400 | = | 610203 50 |
| - | 6300 | x | = | 610203 50 | − | 38400 |
| - | 6300 | x | = | - | 1309797 50 |
1309797 50 | = | 6300 | x |
| 6300 | x | = | 1309797 50 |
| x | = | 1309797 50 | ÷ | 6300 |
| = | 1309797 50 | × | 1 6300 |
| = | 145533 50 | × | 1 700 |
| x | = | 145533 35000 |
| x | = | 4.158086 |