207 1000 | + | ( | 7 10 | x | ÷ | 7 10 | × | x | + | 100 | ) | × | 23 10 | = | ( | 133 250 | x | ÷ | 133 250 | × | x | + | 100 | ) | × | 23 10 |
| 方程左边 = | 207 1000 | + | 7 10 | x | ÷ | 7 10 | × | x | × | 23 10 | + | 100 | × | 23 10 |
| = | 207 1000 | + | 23 10 | x | x | + | 230 |
| = | 230207 1000 | + | 23 10 | x | x |
230207 1000 | + | 23 10 | x | x | = | ( | 133 250 | x | ÷ | 133 250 | × | x | + | 100 | ) | × | 23 10 |
| 方程右边 = | 133 250 | x | ÷ | 133 250 | × | x | × | 23 10 | + | 100 | × | 23 10 |
| = | 23 10 | x | x | + | 230 |
230207 1000 | + | 23 10 | x | x | = | 23 10 | x | x | + | 230 |