| ( | 42309 1000 | + | x | ) | × | 7 4 | = | 38209 500 | − | x | + | 42309 1000 |
| 方程左边 = | 42309 1000 | × | 7 4 | + | x | × | 7 4 |
| = | 296163 4000 | + | x | × | 7 4 |
296163 4000 | + | 7 4 | x | = | 38209 500 | − | x | + | 42309 1000 |
| 方程右边 = | 118727 1000 | − | x |
296163 4000 | + | 7 4 | x | = | 118727 1000 | − | x |
7 4 | x | + | x | = | 118727 1000 | − | 296163 4000 |
11 4 | x | = | 118727 1000 | − | 296163 4000 |
11 4 | x | = | 35749 800 |
| x | = | 35749 800 | ÷ | 11 4 |
| = | 35749 800 | × | 4 11 |
| = | 35749 200 | × | 1 11 |
| x | = | 35749 2200 |
| x | = | 16.249545 |