| 10400 | m | − | 50 | ( | 1 | + | 2 | m | ) | ( | 1 | + | m | ) | − | 10 | = | 0 |
| Left side of the equation = | 10400 | m | − | 50 | × | 1 | ( | 1 | + | m | ) | − | 50 | × | 2 | m | ( | 1 | + | m | ) | − | 10 |
| = | 10400 | m | − | 50 | ( | 1 | + | m | ) | − | 100 | m | ( | 1 | + | m | ) | − | 10 |
| = | 10400 | m | − | 50 | × | 1 | − | 50 | m | − | 100 | m | ( | 1 | + | m | ) | − | 10 |
| = | 10400 | m | − | 50 | − | 50 | m | − | 100 | m | ( | 1 | + | m | ) | − | 10 |
| = | 10350 | m | − | 60 | − | 100 | m | ( | 1 | + | m | ) |
| = | 10350 | m | − | 60 | − | 100 | m | × | 1 | − | 100 | m | m |
| = | 10350 | m | − | 60 | − | 100 | m | − | 100 | m | m |
| = | 10250 | m | − | 60 | − | 100 | m | m |
| 10250 | m | − | 60 | − | 100 | m | m | = | 0 |