| 4 | ( | m | − | 2 | ) | + | 3 | ( | m | + | 3 | ) | − | 5 | = | 2 |
| 方程左边 = | 4 | m | − | 4 | × | 2 | + | 3 | ( | m | + | 3 | ) | − | 5 |
| = | 4 | m | − | 8 | + | 3 | ( | m | + | 3 | ) | − | 5 |
| = | 4 | m | − | 13 | + | 3 | ( | m | + | 3 | ) |
| = | 4 | m | − | 13 | + | 3 | m | + | 3 | × | 3 |
| = | 4 | m | − | 13 | + | 3 | m | + | 9 |
| = | 7 | m | − | 4 |
| 7 | m | − | 4 | = | 2 |
| 7 | m | = | 2 | + | 4 |
| 7 | m | = | 6 |
| m | = | 6 | ÷ | 7 |
| = | 6 | × | 1 7 |
| m | = | 6 7 |
| m | = | 0.857143 |