| 2 | ( | 1000 | − | 200 | m | ) | ( | 1 | + | 1 2 | m | ) | + | 8 | × | 500 | ( | 1 | + | m | ) | = | 14400 |
| Left side of the equation = | 2 | ( | 1000 | − | 200 | m | ) | ( | 1 | + | 1 2 | m | ) | + | 4000 | ( | 1 | + | m | ) |
| 2 | ( | 1000 | − | 200 | m | ) | ( | 1 | + | 1 2 | m | ) | + | 4000 | ( | 1 | + | m | ) | = | 14400 |
| Left side of the equation = | 2 | × | 1000 | ( | 1 | + | 1 2 | m | ) | − | 2 | × | 200 | m | ( | 1 | + | 1 2 | m | ) | + | 4000 | ( | 1 | + | m | ) |
| = | 2000 | ( | 1 | + | 1 2 | m | ) | − | 400 | m | ( | 1 | + | 1 2 | m | ) | + | 4000 | ( | 1 | + | m | ) |
| = | 2000 | × | 1 | + | 2000 | × | 1 2 | m | − | 400 | m | ( | 1 | + | 1 2 | m | ) | + | 4000 | ( | 1 | + | m | ) |
| = | 2000 | + | 1000 | m | − | 400 | m | ( | 1 | + | 1 2 | m | ) | + | 4000 | ( | 1 | + | m | ) |
| = | 2000 | + | 1000 | m | − | 400 | m | × | 1 | − | 400 | m | × | 1 2 | m | + | 4000 | ( | 1 | + | m | ) |
| = | 2000 | + | 1000 | m | − | 400 | m | − | 200 | m | m | + | 4000 | ( | 1 | + | m | ) |
| = | 2000 | + | 600 | m | − | 200 | m | m | + | 4000 | ( | 1 | + | m | ) |
| = | 2000 | + | 600 | m | − | 200 | m | m | + | 4000 | × | 1 | + | 4000 | m |
| = | 2000 | + | 600 | m | − | 200 | m | m | + | 4000 | + | 4000 | m |
| = | 6000 | + | 4600 | m | − | 200 | m | m |
| 6000 | + | 4600 | m | − | 200 | m | m | = | 14400 |