| ( | 163 200 | − | 19 25 | ) | ÷ | ( | x | − | 279 1000 | ) | = | ( | 91 100 | − | 19 25 | ) | ÷ | ( | 193 500 | − | 279 1000 | ) |
| 方程两边同时乘以: | ( | x | − | 279 1000 | ) | , | ( | 193 500 | − | 279 1000 | ) |
| ( | 163 200 | − | 19 25 | ) | ( | 193 500 | − | 279 1000 | ) | = | ( | 91 100 | − | 19 25 | ) | ( | x | − | 279 1000 | ) |
163 200 | ( | 193 500 | − | 279 1000 | ) | − | 19 25 | ( | 193 500 | − | 279 1000 | ) | = | ( | 91 100 | − | 19 25 | ) | ( | x | − | 279 1000 | ) |
163 200 | ( | 193 500 | − | 279 1000 | ) | − | 19 25 | ( | 193 500 | − | 279 1000 | ) | = | 91 100 | ( | x | − | 279 1000 | ) | − | 19 25 | ( | x | − | 279 1000 | ) |
163 200 | × | 193 500 | − | 163 200 | × | 279 1000 | − | 19 25 | ( | 193 500 | − | 279 1000 | ) | = | 91 100 | ( | x | − | 279 1000 | ) | − | 19 25 | ( | x | − | 279 1000 | ) |
163 200 | × | 193 500 | − | 163 200 | × | 279 1000 | − | 19 25 | ( | 193 500 | − | 279 1000 | ) | = | 91 100 | x | − | 91 100 | × | 279 1000 | − | 19 25 | ( | x | − | 279 1000 | ) |
31459 100000 | − | 45477 200000 | − | 19 25 | ( | 193 500 | − | 279 1000 | ) | = | 91 100 | x | − | 25389 100000 | − | 19 25 | ( | x | − | 279 1000 | ) |