x-2分之x-x-7分之x-9等于x-1分之x+1+x-6分之x-8

12分之x+10=7X分之x+2解12分之x+10=7分之1X+212分之x=7分之1X+2-1012分之x=7分之1X-8

请加括号再问：没有括号再答：是这样吗？x/(x-2)+x/(x-7)-9=x/(x-1)+1+x/(x-6)-8再问：是：x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(

请在此输入您的回答

x+2分之x+1+x+9分之x+8=x+3分之x+2+x+8分之x+7即x+2分之1+x+9分之1=x+3分之1+x+8分之1即x+2分之1-x+3分之1=+x+8分之1-x+9分之1（x＋2）（x＋

(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6=1/(x-3)+(1-x)/2(x+3)-6/(x+3)(x-3)=[2(x+3)+(1-x)(x-3)-12]/2(x+3)(

(x/2)+(x/6)+(x/12)+(x/20)+(x/30)+(x/42)=x/(1*2)+x/(2*3)+x/(3*4)+x/(4*5)+x/(5*6)+x/(6*7)=x-x/2+x/2-x/

2/(x+3)(x-3）+(x-2)/x(x-3)=1/x(x+3)两边乘x(x+3)(x-3)2x+x^2+x-6=x-3x^2+2x-3=0(x+3)(x-1)=0x+3在分母,不等于0所以x=1

1、x-x-1分之1=1X(X-1)=X-1(X-1)^2=0X=1,经检验X=1是增根,原方程无解.2、1-x分之1-2=1-x²分之3x-x²(1+X)-2(1-X^2)=3X

公分母是2(x+3)²(x-3)所以6-2x分之x-1=2(x+3)²(x-3)分之[-2(x-1)(x+3)²]x²-9分之6=2(x+3)²(x-

4-4x分之9x-9=9(x-1)/4(1-x)=-9/4

2x分之(x+2)*(x^2+5x+6)分之(x^3-3x^2)÷(x^2+2x-3)分之(x^3-9x)=2x分之(x+2)*(x+2)(x+3)分之x^2(x-3)*x(x+3)(x-3)分之(x

两边乘以66得6(x-9)-22(x+2)=66(x-1)-33(x-2)6x-54-22x-44=66x-66-33x+66-49x=98x=-2

每个分式减去1(x-4-x+5)/(x-5)+(x-8-x+9)/(x-9)=(x-7-x+8)/(x-8)+(x-5-x+6)/(x-6)1/(x-5)+1/(x-9)=1/(x-8)+1/(x-6

4分之5X-X+3=3分之2X-7-6分之X-25X/4-X+3=(2X–7)/3-(X-2)/615X-12X+36=4(2X–7)-2(X-2)3X+36=6X–243x=60X=20

(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)=

[(x+2)-1]/(x+2)+1-1/(x+9)=1-1/(x+3)+1-1/(x+8)后面的三个仿第一个化简-1/(x+2)-1/(x+9)=1-1/(x+3)-1/(x+8)两边同时减去21/(

(1-9分之2)x=12分之79分之7x=12分之7x=12分之7÷9分之7x=4分之3

（x-2分之x减x+2分之x）=(x-2)(x+2)分之x(x+2)-x(x-2)乘4x分之2-x=(x-2)(x+2)分之4x乘4x分之2-x=-x-2

注:分子/分母(1/x-3)+(1/9-x^2)-(x-1/6-2x)通分:=2(x+3)/2(x+3)(x-3)+12/2(9-x^2)-(x-1)(3+x)/2(3-x)(3+x)=2x+6/2(