31441 20 | + | 1357 50 | x | = | 3213 20 | + | 357 200 | ( | 20 | x | − | 50 | ) | ÷ | x | × | ( | x | − | 3 | ) |
| 方程两边同时乘以: | x |
31441 20 | x | + | 1357 50 | x | x | = | 3213 20 | x | + | 357 200 | ( | 20 | x | − | 50 | ) | ( | x | − | 3 | ) |
31441 20 | x | + | 1357 50 | x | x | = | 3213 20 | x | + | 357 200 | × | 20 | x | ( | x | − | 3 | ) | − | 357 200 | × | 50 | ( | x | − | 3 | ) |
31441 20 | x | + | 1357 50 | x | x | = | 3213 20 | x | + | 357 10 | x | ( | x | − | 3 | ) | − | 357 4 | ( | x | − | 3 | ) |
31441 20 | x | + | 1357 50 | x | x | = | 3213 20 | x | + | 357 10 | x | x | − | 357 10 | x | × | 3 | − | 357 4 | ( | x | − | 3 | ) |
31441 20 | x | + | 1357 50 | x | x | = | 3213 20 | x | + | 357 10 | x | x | − | 1071 10 | x | − | 357 4 | ( | x | − | 3 | ) |
31441 20 | x | + | 1357 50 | x | x | = | 1071 20 | x | + | 357 10 | x | x | − | 357 4 | ( | x | − | 3 | ) |
31441 20 | x | + | 1357 50 | x | x | = | 1071 20 | x | + | 357 10 | x | x | − | 357 4 | x | + | 357 4 | × | 3 |
31441 20 | x | + | 1357 50 | x | x | = | 1071 20 | x | + | 357 10 | x | x | − | 357 4 | x | + | 1071 4 |
31441 20 | x | + | 1357 50 | x | x | = | - | 357 10 | x | + | 357 10 | x | x | + | 1071 4 |