49 5 | × | 1 2 | × | 2 | × | 1 2 | × | 1 5 | × | 1 5 | ÷ | 7 20 | + | 7 20 | × | 49 5 | x | = | 147 10 | ( | x | + | 1 20 | ) | ( | x | + | 1 20 | ) | − | 147 10 | × | 1 20 | × | 1 20 |
| 方程左边 = | 14 25 | + | 343 100 | x |
14 25 | + | 343 100 | x | = | 147 10 | ( | x | + | 1 20 | ) | ( | x | + | 1 20 | ) | − | 147 10 | × | 1 20 | × | 1 20 |
| 方程右边 = | 147 10 | ( | x | + | 1 20 | ) | ( | x | + | 1 20 | ) | − | 147 4000 |
14 25 | + | 343 100 | x | = | 147 10 | ( | x | + | 1 20 | ) | ( | x | + | 1 20 | ) | − | 147 4000 |
| 方程右边 = | 147 10 | x | ( | x | + | 1 20 | ) | + | 147 10 | × | 1 20 | ( | x | + | 1 20 | ) | − | 147 4000 |
| = | 147 10 | x | ( | x | + | 1 20 | ) | + | 147 200 | ( | x | + | 1 20 | ) | − | 147 4000 |
| = | 147 10 | x | x | + | 147 10 | x | × | 1 20 | + | 147 200 | ( | x | + | 1 20 | ) | − | 147 4000 |
| = | 147 10 | x | x | + | 147 200 | x | + | 147 200 | ( | x | + | 1 20 | ) | − | 147 4000 |
| = | 147 10 | x | x | + | 147 200 | x | + | 147 200 | x | + | 147 200 | × | 1 20 | − | 147 4000 |
| = | 147 10 | x | x | + | 147 200 | x | + | 147 200 | x | + | 147 4000 | − | 147 4000 |
| = | 147 10 | x | x | + | 147 100 | x | + | 0 |
14 25 | + | 343 100 | x | = | 147 10 | x | x | + | 147 100 | x | + | 0 |