| X | − | X | ÷ | 101 100 | × | 1 100 | − | X | ÷ | 101 100 | × | 4 5 | × | 1 5 | = | 3500 | × | 12 |
| Left side of the equation = | X | − | X | × | 1 101 | − | X | × | 16 101 |
| = | 84 101 | X |
84 101 | X | = | 3500 | × | 12 |
| Right side of the equation = | 42000 |
84 101 | X | = | 42000 |
| X | = | 42000 | ÷ | 84 101 |
| = | 42000 | × | 101 84 |
| = | 500 | × | 101 |
| X | = | 50500 |