| 500 | + | x | = | 5000 | + | 254616 25 | + | ( | 500 | + | x | − | 641796 25 | ) | × | 1 4 | + | 1288357 100 |
| Right side of the equation = | 2806821 100 | + | ( | 500 | + | x | − | 641796 25 | ) | × | 1 4 |
| 500 | + | x | = | 2806821 100 | + | ( | 500 | + | x | − | 641796 25 | ) | × | 1 4 |
| Right side of the equation = | 2806821 100 | + | 500 | × | 1 4 | + | x | × | 1 4 | − | 641796 25 | × | 1 4 |
| = | 2806821 100 | + | 125 | + | x | × | 1 4 | − | 160449 25 |
| = | 87101 4 | + | 1 4 | x |
| 500 | + | x | = | 87101 4 | + | 1 4 | x |
| x | − | 1 4 | x | = | 87101 4 | − | 500 |
3 4 | x | = | 87101 4 | − | 500 |
3 4 | x | = | 85101 4 |
| x | = | 85101 4 | ÷ | 3 4 |
| = | 85101 4 | × | 4 3 |
| = | 28367 | × | 1 |
| x | = | 28367 |