| ( | ( | 329 | × | 9 | ) | + | ( | 10 | x | ) | ) | ÷ | ( | 329 | + | x | ) | = | 91 10 |
| 方程两边同时乘以: | ( | 329 | + | x | ) |
| ( | ( | 329 | × | 9 | ) | + | ( | 10 | x | ) | ) | = | 91 10 | ( | 329 | + | x | ) |
| ( | 329 | × | 9 | ) | + | ( | 10 | x | ) | = | 91 10 | ( | 329 | + | x | ) |
| ( | 329 | × | 9 | ) | + | ( | 10 | x | ) | = | 91 10 | × | 329 | + | 91 10 | x |
| ( | 329 | × | 9 | ) | + | ( | 10 | x | ) | = | 29939 10 | + | 91 10 | x |
| 329 | × | 9 | + | ( | 10 | x | ) | = | 29939 10 | + | 91 10 | x |
| 2961 | + | ( | 10 | x | ) | = | 29939 10 | + | 91 10 | x |
| 2961 | + | 10 | x | = | 29939 10 | + | 91 10 | x |
| 10 | x | − | 91 10 | x | = | 29939 10 | − | 2961 |
9 10 | x | = | 29939 10 | − | 2961 |
9 10 | x | = | 329 10 |
| x | = | 329 10 | ÷ | 9 10 |
| = | 329 10 | × | 10 9 |
| = | 329 | × | 1 9 |
| x | = | 329 9 |
| x | = | 36.555556 |