| ( | 1 | − | ( | 100 | × | 10000 | ÷ | 10000 | ) | − | ( | 100 | × | 10000 | ÷ | x | ) | − | 1 20 | ) | × | 100 100 | = | 3 200 |
| 1 | × | 100 100 | − | ( | 100 | × | 10000 | ÷ | 10000 | ) | × | 100 100 | − | ( | 100 | × | 10000 | ÷ | x | ) | × | 100 100 | − | 1 20 | × | 100 100 | = | 3 200 |
| 1 | − | ( | 100 | × | 10000 | ÷ | 10000 | ) | × | 100 100 | − | ( | 100 | × | 10000 | ÷ | x | ) | × | 100 100 | − | 1 20 | = | 3 200 |
19 20 | − | ( | 100 | × | 10000 | ÷ | 10000 | ) | × | 100 100 | − | ( | 100 | × | 10000 | ÷ | x | ) | × | 100 100 | = | 3 200 |
19 20 | − | 100 | × | 10000 | ÷ | 10000 | × | 100 100 | − | ( | 100 | × | 10000 | ÷ | x | ) | × | 100 100 | = | 3 200 |
19 20 | − | 100 | − | ( | 100 | × | 10000 | ÷ | x | ) | × | 100 100 | = | 3 200 |
| - | 1981 20 | − | ( | 100 | × | 10000 | ÷ | x | ) | × | 100 100 | = | 3 200 |
| - | 1981 20 | − | 100 | × | 10000 | ÷ | x | × | 100 100 | = | 3 200 |
| - | 1981 20 | − | 1000000 | ÷ | x | = | 3 200 |
| 方程两边同时乘以: | x |
| - | 1981 20 | x | − | 1000000 | = | 3 200 | x |
| - | 1981 20 | x | − | 3 200 | x | = | 1000000 |
| - | 19813 200 | x | = | 1000000 |
| - | 1000000 | = | 19813 200 | x |
19813 200 | x | = | - | 1000000 |
| x | = | - | 1000000 | ÷ | 19813 200 |
| = | - | 1000000 | × | 200 19813 |
| x | = | - | 200000000 19813 |
| x | = | - 10094.382476 |