| 83 | x | + | 20 | = | ( | 2181 100 | x | + | 19 25 | ) | × | 36 5 |
| 方程右边 = | 2181 100 | x | × | 36 5 | + | 19 25 | × | 36 5 |
| = | 19629 125 | x | + | 684 125 |
| 83 | x | + | 20 | = | 19629 125 | x | + | 684 125 |
| 83 | x | − | 19629 125 | x | = | 684 125 | − | 20 |
| - | 9254 125 | x | = | 684 125 | − | 20 |
| - | 9254 125 | x | = | - | 1816 125 |
1816 125 | = | 9254 125 | x |
9254 125 | x | = | 1816 125 |
| x | = | 1816 125 | ÷ | 9254 125 |
| = | 1816 125 | × | 125 9254 |
| = | 908 | × | 1 4627 |
| x | = | 908 4627 |
| x | = | 0.196239 |