整理,得:2x+5=0,
解得:x=-2.5;
经检验,x=-2.5是原方程的解.
(2)原方程可化为:(1+
| 1 |
| x+1 |
| 1 |
| x+3 |
| 1 |
| x+5 |
| 1 |
| x+7 |
整理得:
| 1 |
| (x+1)(x+3) |
| 1 |
| (x+5)(x+7) |
去分母得:(x+5)(x+7)=(x+1)(x+3),
即:x2+12x+35=x2+4x+3,解得x=-4;
经检验,x=-4是原方程的解.
| 1 |
| x+1 |
| 3 |
| 2-x |
| x+2 |
| x+1 |
| x+4 |
| x+3 |
| x+6 |
| x+5 |
| x+8 |
| x+7 |
| 1 |
| x+1 |
| 1 |
| x+3 |
| 1 |
| x+5 |
| 1 |
| x+7 |
| 1 |
| (x+1)(x+3) |
| 1 |
| (x+5)(x+7) |