| m | ÷ | 2 | + | 40 | ÷ | 10 | × | m | = | m | ÷ | 2 | − | 40 | ÷ | 15 | × | m |
| Left side of the equation = | m | × | 1 2 | + | 4 | m |
| = | 9 2 | m |
9 2 | m | = | m | ÷ | 2 | − | 40 | ÷ | 15 | × | m |
| Right side of the equation = | m | × | 1 2 | − | 8 3 | m |
| = | - | 13 6 | m |
9 2 | m | = | - | 13 6 | m |
9 2 | m | + | 13 6 | m | = | 0 |
20 3 | m | = | 0 |
| m | = | 0 | ÷ | 20 3 |
| = | 0 | × | 3 20 |
| m | = | 0 |