| - | 31409 10000 | + | ( | 238121 100 | × | 1 2000 | ) | ÷ | ( | 1 2000 | + | x | ) | = | 8077 10000 | − | 8273 10000 | x |
| 方程两边同时乘以: | ( | 1 2000 | + | x | ) |
| - | 31409 10000 | ( | 1 2000 | + | x | ) | + | ( | 238121 100 | × | 1 2000 | ) | = | 8077 10000 | ( | 1 2000 | + | x | ) | − | 8273 10000 | x | ( | 1 2000 | + | x | ) |
| - | 31409 10000 | × | 1 2000 | − | 31409 10000 | x | + | ( | 238121 100 | × | 1 2000 | ) | = | 8077 10000 | ( | 1 2000 | + | x | ) | − | 8273 10000 | x | ( | 1 2000 | + | x | ) |
| - | 31409 10000 | × | 1 2000 | − | 31409 10000 | x | + | ( | 238121 100 | × | 1 2000 | ) | = | 8077 10000 | × | 1 2000 | + | 8077 10000 | x | − | 8273 10000 | x | ( | 1 2000 | + | x | ) |
| - | 31409 20000000 | − | 31409 10000 | x | + | ( | 238121 100 | × | 1 2000 | ) | = | 8077 20000000 | + | 8077 10000 | x | − | 8273 10000 | x | ( | 1 2000 | + | x | ) |
| - | 31409 20000000 | − | 31409 10000 | x | + | 238121 100 | × | 1 2000 | = | 8077 20000000 | + | 8077 10000 | x | − | 8273 10000 | x | ( | 1 2000 | + | x | ) |
| - | 31409 20000000 | − | 31409 10000 | x | + | 238121 100 | × | 1 2000 | = | 8077 20000000 | + | 8077 10000 | x | − | 8273 10000 | x | × | 1 2000 | − | 8273 10000 | x | x |
| - | 31409 20000000 | − | 31409 10000 | x | + | 238121 200000 | = | 8077 20000000 | + | 8077 10000 | x | − | 8273 20000000 | x | − | 8273 10000 | x | x |