| ( | x | − | 8935669 10000000 | ) | ÷ | ( | 4252323 10000000 | + | 8935669 10000000 | − | x | ) | = | 398488489 500000000 |
| 方程两边同时乘以: | ( | 4252323 10000000 | + | 8935669 10000000 | − | x | ) |
| ( | x | − | 8935669 10000000 | ) | = | 398488489 500000000 | ( | 4252323 10000000 | + | 8935669 10000000 | − | x | ) |
| x | − | 8935669 10000000 | = | 398488489 500000000 | ( | 4252323 10000000 | + | 8935669 10000000 | − | x | ) |
| x | − | 8935669 10000000 | = | 398488489 500000000 | × | 4252323 10000000 | + | 398488489 500000000 | × | 8935669 10000000 | − | 398488489 500000000 | x |