3901 1000 | X | = | ( | 693 100 | − | X | ) | ( | X | − | 1 | ) |
| Right side of the equation = | 693 100 | ( | X | − | 1 | ) | − | X | ( | X | − | 1 | ) |
| = | 693 100 | X | − | 693 100 | × | 1 | − | X | ( | X | − | 1 | ) |
| = | 693 100 | X | − | 693 100 | − | X | ( | X | − | 1 | ) |
| = | 693 100 | X | − | 693 100 | − | X | X | + | X | × | 1 |
| = | 793 100 | X | − | 693 100 | − | X | X |
3901 1000 | X | = | 793 100 | X | − | 693 100 | − | X | X |