| ( | 42309 1000 | + | x | ) | × | 17 20 | = | 38209 500 | − | x | + | 42309 1000 |
| 方程左边 = | 42309 1000 | × | 17 20 | + | x | × | 17 20 |
| = | 719253 20000 | + | x | × | 17 20 |
719253 20000 | + | 17 20 | x | = | 38209 500 | − | x | + | 42309 1000 |
| 方程右边 = | 118727 1000 | − | x |
719253 20000 | + | 17 20 | x | = | 118727 1000 | − | x |
17 20 | x | + | x | = | 118727 1000 | − | 719253 20000 |
37 20 | x | = | 118727 1000 | − | 719253 20000 |
37 20 | x | = | 1655287 20000 |
| x | = | 1655287 20000 | ÷ | 37 20 |
| = | 1655287 20000 | × | 20 37 |
| = | 1655287 1000 | × | 1 37 |
| x | = | 1655287 37000 |
| x | = | 44.737486 |