| 1 |
| x+2 |
| 1 |
| x+7 |
| 1 |
| x+3 |
| 1 |
| x+6 |
故
| 1 |
| x+2 |
| 1 |
| x+7 |
| 1 |
| x+3 |
| 1 |
| x+6 |
| 1 |
| x+2 |
| 1 |
| x+3 |
| 1 |
| x+6 |
| 1 |
| x+7 |
即
| 1 |
| (x+6)(x+7) |
| 1 |
| (x+2)(x+3) |
所以(x+6)(x+7)=(x+2)(x+3).
x=-
| 9 |
| 2 |
经检验x=-
| 9 |
| 2 |
| x+1 |
| x+2 |
| x+6 |
| x+7 |
| x+2 |
| x+3 |
| x+5 |
| x+6 |
| 1 |
| x+2 |
| 1 |
| x+7 |
| 1 |
| x+3 |
| 1 |
| x+6 |
| 1 |
| x+2 |
| 1 |
| x+7 |
| 1 |
| x+3 |
| 1 |
| x+6 |
| 1 |
| x+2 |
| 1 |
| x+3 |
| 1 |
| x+6 |
| 1 |
| x+7 |
| 1 |
| (x+6)(x+7) |
| 1 |
| (x+2)(x+3) |
| 9 |
| 2 |
| 9 |
| 2 |