| 1000 | × | 31 1000 | + | 32 100 | x | = | ( | 1000 | + | x | ) | × | 7 200 |
| 方程左边 = | 31 | + | 32 100 | x |
| 31 | + | 32 100 | x | = | ( | 1000 | + | x | ) | × | 7 200 |
| 方程右边 = | 1000 | × | 7 200 | + | x | × | 7 200 |
| = | 35 | + | x | × | 7 200 |
| 31 | + | 32 100 | x | = | 35 | + | 7 200 | x |
32 100 | x | − | 7 200 | x | = | 35 | − | 31 |
57 200 | x | = | 35 | − | 31 |
57 200 | x | = | 4 |
| x | = | 4 | ÷ | 57 200 |
| = | 4 | × | 200 57 |
| x | = | 800 57 |
| x | = | 14.035088 |