| ( | 1843 10 | + | 3 | x | ) | ÷ | ( | 519 5 | + | x | ) | = | 31 10 |
| 方程两边同时乘以: | ( | 519 5 | + | x | ) |
| ( | 1843 10 | + | 3 | x | ) | = | 31 10 | ( | 519 5 | + | x | ) |
1843 10 | + | 3 | x | = | 31 10 | ( | 519 5 | + | x | ) |
1843 10 | + | 3 | x | = | 31 10 | × | 519 5 | + | 31 10 | x |
1843 10 | + | 3 | x | = | 16089 50 | + | 31 10 | x |
| 3 | x | − | 31 10 | x | = | 16089 50 | − | 1843 10 |
| - | 1 10 | x | = | 16089 50 | − | 1843 10 |
| - | 1 10 | x | = | 3437 25 |
| - | 3437 25 | = | 1 10 | x |
1 10 | x | = | - | 3437 25 |
| x | = | - | 3437 25 | ÷ | 1 10 |
| = | - | 3437 25 | × | 10 |
| = | - | 3437 5 | × | 2 |
| x | = | - | 6874 5 |
| x | = | - 1374.8 |