| ( | 329 | × | 9 | ) | + | ( | 10 | x | ) | ÷ | 329 | + | x | = | 91 10 |
| 方程左边 = | 329 | × | 9 | + | ( | 10 | x | ) | × | 1 329 | + | x |
| = | 2961 | + | ( | 10 | x | ) | × | 1 329 | + | x |
| = | 2961 | + | 10 | x | × | 1 329 | + | x |
| = | 2961 | + | 10 329 | x | + | x |
| = | 2961 | + | 339 329 | x |
| 2961 | + | 339 329 | x | = | 91 10 |
339 329 | x | = | 91 10 | − | 2961 |
339 329 | x | = | - | 29519 10 |
| x | = | - | 29519 10 | ÷ | 339 329 |
| = | - | 29519 10 | × | 329 339 |
| x | = | - | 9711751 3390 |
| x | = | - 2864.823304 |