整理,得:2x+5=0,
解得:x=-2.5;
經(jīng)檢驗,x=-2.5是原方程的解.
(2)原方程可化為:(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;
經(jīng)檢驗,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) |