3分之2x-6分之1x=30 12又2分之1

若原题是：5/2x+3=1/3+7x移项得5/2x-7x=1/3-3合并同类项得-9/2X=-8/3两边同乘以-2/9,得x=16/27.若原题是：(5x+3)/2=(1+7x)/3去分母得3(5x+

6分之1X+3分之2X=80两边乘以65x=80*6x=96

X+1分之X+2+X+7分之X+8=X+5分之X+6+X+3分之X+4等式两边各2个x常数和都为10所以都约去得1／x＋7／x＝5／x＋3／x为恒等式所以x为不等于零的任意实数再问：������ڶ�Щ

3/4x-2/3x=1/6,解得x=215*(1/15+2/17)*17=4715X(1/151+2/17)X17=15x17x(1/15+2/17)=15x17x1/15+15x17x2/17=17

2/3x+1/6x=155/6x=15x=18

(1)2x/(x+1)=12x=x+1x=1(2)x/(x-2)-1/(x²-4)=1x(x+2)-1=x²-4x²+2x-1=x²-42x=-3x=-3/2(

x+1分之x+2减去x+3分之x+4=x+5分之x+6减去X+7分之x+8方程两边分别通分,得[(x+2)(x+3)-(x+1)(x+4)]/[(x+1)(x+3)]=[(x+6)(x+7)-(x+8

化简等式得：1-1/(X+6)+1-1/(x+3)=1-1/(x+2)+1-1/(x+7),整理得1/(x+6)-1/(x+7)=1/(x+2)-1/(x+3)；1/[(x+6)(x+7)]=1/[(

4x(/x-2)-1=3/(2-x)4x(/x-2)-3/(2-x)=14x/(x-2)+3/(x-2)=1(4x+3)/(x-2)=14x+3=x-23x=-5x=-5/3,经检验不是增根x/(x-

我来再问：再答：再答：就这样再答：谢谢采纳

(x-3)分之x-(x^2-3x)分之(x+6)+x分之1等于几?=x²/x(x-3)-(x+6)/x(x-3)+(x-3)/x(x-3)=(x²-x-6+x-3)/x(x-3)=

等号前后同时分别计算减法得：(x+1)(x+3)分之2=(x+5)(x+7)分之2所以：(x+1)(x+3)=(x+5)(x+7)x^2+4x+3=x^2+12x+35x=-4

1)去分母得2(x-1)+3(x+1)=62x-2+3x+3=6∴x=1经检验：x=1是增根∴方程无解2)设y=(x+1)/x,∴x/(x+1)=1/y∴原方程可化为y+5/y=6∴y平方-6y+5=

3分之2x+25%x=6分之12/3x+1/4x=1/68x+3x=211x=2x=2/11

再问：再答：

(x+1)/(x+2)-1/(x+7)=（x+2)/（x+3)-1/(X+6）(X+2-1)/(X+2)-1/(X+7)=(X+3-1)/(X+3)-1/(X+6)1-1/(X+2)-1/(X+7)=

两边乘63(x+1)+2(x-1)-12=2x+13x+3+2x-2-12=2x+15x-11=2x+13x=12x=4再问：再问一道：3分之2x-2分之3（1-3分之3-x）=6分之2-3x再答：采

x+2分之x+1-x+3分之x+2=x+6分之x+5-x+7分之x+61-（x+2）分之1-[1-（x+3）分之1]=1-(x+6)分之1-【1-(x+7)分之1】从而(x+3)分之1-(x+2)分之

本人一次只回答一个算了吧或者你分开提问x/(x+2)=x/(x-1)两边乘(x+2)(x-1)x²-x=x²+2x3x=0x=0经检验,x=0是方程的解

X=4原式=(X-1)/(X-2)-(X-2)/(X-3)=(X-4)/(X-5)-(X-5)/(X-6)左边通分=[X^2-4X+3-X^2+4X-4]/[(X-2)(X-3)]=-1/[(X-2)