解分式方程 3⼀(2x-4)+x⼀(2-x)=1⼀2 x+3⼀(x+2)+1=1⼀(2+x) 2x+5⼀(3x-6)-1⼀2=4-5x⼀(4-2x)

2024-12-02 22:27:48
推荐回答(3个)
回答(1):

3/(2x-4)+x/(2-x)=1/2
3/[2(x-2)]+x/(2-x)-1/2=0
(3+2x-2x+4)/[2(x-2)]=0
7/[2(x-2)]=0 无解

(x+3)/(x+2)+1=1/(2+x)
(x+3)/(x+2)+1-1/(2+x) =0
(x+3+x+2-1)/(x+2) =0
2(x+2)/(x+2) =0
2=0,无解

(2x+5)/(3x-6)-1/2=(4-5x)/(4-2x)
(2x+5)/(3x-6)-1/2-(4-5x)/(4-2x)=0
(2x+5)/[3(x-2)]-1/2-(4-5x)/[-2(x-2)]=0
(2x+5)/[3(x-2)]-1/2+(4-5x)/[2(x-2)]=0
[2(2x+5)-3(x-2)+3(4-5x)] / [6(x-2)]=0
[4x+10-3x+6+12-15x] / [6(x-2)]=0
-14[x-2] / [6(x-2)]=0
-14 / 6=0, 无解

回答(2):

没一人回答你,一看就头痛嘛。

回答(3):

x=3,x=3/2