| 587 | x | + | ( | 100 | + | x | ) | × | 21 | + | ( | 200 | + | x | ) | × | 7 | + | 200 | × | 79 | + | 300 | × | 104 | + | 1000 | + | 59 | = | 1438800 |
| Left side of the equation = | 587 | x | + | ( | 100 | + | x | ) | × | 21 | + | ( | 200 | + | x | ) | × | 7 | + | 15800 | + | 31200 | + | 1000 | + | 59 | x | + | ( | x | + | 200 | ) |
| = | 646 | x | + | ( | 100 | + | x | ) | × | 21 | + | ( | 200 | + | x | ) | × | 7 | + | 48000 | + | ( | x | + | 200 | ) | × | 14 |
| 646 | x | + | ( | 100 | + | x | ) | × | 21 | + | ( | 200 | + | x | ) | × | 7 | + | 48000 | + | ( | x | + | 200 | ) | × | 14 | = | 1438800 |
| Left side of the equation = | 646 | x | + | 100 | × | 21 | + | x | × | 21 | + | ( | 200 | + | x | ) | × | 7 | + | 48000 | + | ( | x | + | 200 | ) | × | 14 |
| = | 646 | x | + | 2100 | + | x | × | 21 | + | ( | 200 | + | x | ) | × | 7 | + | 48000 | + | ( | x | + | 200 | ) | × | 14 |
| = | 667 | x | + | 50100 | + | ( | 200 | + | x | ) | × | 7 | + | ( | x | + | 200 | ) | × | 14 |
| = | 667 | x | + | 50100 | + | 200 | × | 7 | + | x | × | 7 | + | ( | x | + | 200 | ) | × | 14 |
| = | 667 | x | + | 50100 | + | 1400 | + | x | × | 7 | + | ( | x | + | 200 | ) | × | 14 |
| = | 674 | x | + | 51500 | + | ( | x | + | 200 | ) | × | 14 |
| = | 674 | x | + | 51500 | + | x | × | 14 | + | 200 | × | 14 |
| = | 674 | x | + | 51500 | + | x | × | 14 | + | 2800 |
| = | 688 | x | + | 54300 |
| 688 | x | + | 54300 | = | 1438800 |
| 688 | x | = | 1438800 | − | 54300 |
| 688 | x | = | 1384500 |
| x | = | 1384500 | ÷ | 688 |
| = | 1384500 | × | 1 688 |
| = | 346125 | × | 1 172 |
| x | = | 346125 172 |
| x | = | 2012.354651 |