| x | × | 1 | = | ( | 3 400 | ÷ | 3300 | + | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | × | ( | 4889 | − | x | × | 1 | ) | ) | ÷ | ( | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | ) |
| 方程两边同时乘以: | ( | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | ) |
| x | × | 1 | ( | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | ) | = | ( | 3 400 | ÷ | 3300 | + | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | × | ( | 4889 | − | x | × | 1 | ) | ) |
| x | × | 1 | × | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | = | ( | 3 400 | ÷ | 3300 | + | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | × | ( | 4889 | − | x | × | 1 | ) | ) |
| x | × | 1 | × | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | = | 3 400 | ÷ | 3300 | + | 13 100 | × | 11 80 | ÷ | 3300 | ÷ | 3300 | × | ( | 4889 | − | x | × | 1 | ) |
| x | × | 13 7920000000 | = | 1 440000 | + | 13 7920000000 | ( | 4889 | − | x | × | 1 | ) |
13 7920000000 | x | = | 1 440000 | + | 13 7920000000 | × | 4889 | − | 13 7920000000 | x | × | 1 |
13 7920000000 | x | = | 1 440000 | + | 63557 7920000000 | − | 13 7920000000 | x |