20029 10000 | − | ( | X | − | 280401 10000 | ) | ÷ | 20029 10000 | = | 19 500 |
| Left side of the equation = | 20029 10000 | − | X | × | 10000 20029 | + | 280401 10000 | × | 10000 20029 |
| = | 20029 10000 | − | X | × | 10000 20029 | + | 280401 20029 |
| = | 3205170841 200290000 | − | 10000 20029 | X |
3205170841 200290000 | − | 10000 20029 | X | = | 19 500 |
| - | 10000 20029 | X | = | 19 500 | − | 3205170841 200290000 |