| ( | ( | 72869 20 | − | X | − | 613993 100 | ) | ÷ | 613993 100 | ) | × | 1 2 | = | ( | ( | 1761 | + | X | ) | − | 371613 100 | ) | ÷ | 371613 100 |
| Left side of the equation = | ( | 72869 20 | − | X | − | 613993 100 | ) | ÷ | 613993 100 | × | 1 2 |
| = | ( | 72869 20 | − | X | − | 613993 100 | ) | × | 50 613993 |
| = | 72869 20 | × | 50 613993 | − | X | × | 50 613993 | − | 613993 100 | × | 50 613993 |
| = | 364345 1227986 | − | X | × | 50 613993 | − | 613993 1227986 |
| = | - | 124824 613993 | − | 50 613993 | X |
| - | 124824 613993 | − | 50 613993 | X | = | ( | ( | 1761 | + | X | ) | − | 371613 100 | ) | ÷ | 371613 100 |
| Right side of the equation = | ( | 1761 | + | X | ) | × | 100 371613 | − | 371613 100 | × | 100 371613 |
| = | ( | 1761 | + | X | ) | × | 100 371613 | − | 11261 11261 |
| = | 1761 | × | 100 371613 | + | X | × | 100 371613 | − | 11261 11261 |
| = | 58700 123871 | + | X | × | 100 371613 | − | 11261 11261 |
| = | - | 65171 123871 | + | 100 371613 | X |
| - | 124824 613993 | − | 50 613993 | X | = | - | 65171 123871 | + | 100 371613 | X |
| - | 50 613993 | X | − | 100 371613 | X | = | - | 65171 123871 | + | 124824 613993 |