| ( | 19 10 | x | + | 31023 1000 | × | 700 | ) | ÷ | ( | x | + | 700 | ) | = | 28 |
| 方程两边同时乘以: | ( | x | + | 700 | ) |
| ( | 19 10 | x | + | 31023 1000 | × | 700 | ) | = | 28 | ( | x | + | 700 | ) |
19 10 | x | + | 31023 1000 | × | 700 | = | 28 | ( | x | + | 700 | ) |
19 10 | x | + | 31023 1000 | × | 700 | = | 28 | x | + | 28 | × | 700 |
19 10 | x | + | 217161 10 | = | 28 | x | + | 19600 |
19 10 | x | − | 28 | x | = | 19600 | − | 217161 10 |
| - | 261 10 | x | = | 19600 | − | 217161 10 |
| - | 261 10 | x | = | - | 21161 10 |
21161 10 | = | 261 10 | x |
261 10 | x | = | 21161 10 |
| x | = | 21161 10 | ÷ | 261 10 |
| = | 21161 10 | × | 10 261 |
| = | 21161 | × | 1 261 |
| x | = | 21161 261 |
| x | = | 81.076628 |