| x | = | ( | 643 100 | ÷ | 1000000 | ) | ÷ | 1 | − | 643 100 | ÷ | 1000000 |
| Right side of the equation = | ( | 643 100 | ÷ | 1000000 | ) | × | 1 | − | 643 100000000 |
| x | = | ( | 643 100 | ÷ | 1000000 | ) | × | 1 | − | 643 100000000 |
| Right side of the equation = | 643 100 | ÷ | 1000000 | × | 1 | − | 643 100000000 |
| = | 643 100000000 | − | 643 100000000 |
| = | 0 |
| x | = | 0 |