x-3分之1 -x²-9分之6-6-2x分之x-1

5分之4x等于20分之11x=11/20*5/4x=11/164分之3x+3等于63x/4=6-3x=3*4/3x=49分之5x+3分之1x等于18分之55x/9+3x/9=5/188x/9=5/18

X(X+3)(x+6)分之(x+6)+x(x+3)(x+6)分之x+(x+6)(x+9)分之1X(X+3)(x+6)分之(2x+6)+(x+6)(x+9)分之1x(x+6)分之2)+(x+6)(x+9

1/3x*4/9=1/64/27x=1/6x=1/6*27/4x=9/88x=6/25除以1/58x=6/25*5x=6/5除以8x=6/5*1/8x=3/20

x+3分之x+x平方-9分之6等于x-3分之1两边乘（x+3）（x-3）x(x-3)+6=x+3x²-3x+6=x+3x²-4x+3=0(x-3)(x-1)=0x1=3x2=1由于

x：7分之4=3分之1x=1/3×4/7x=4/218分之15：x=2分之3x=15/8÷3/2x=5/46分之1÷10分之9=5分之2：x5/27=2/5：xx=2/5÷5/27x=54/25

(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)(

1/3[1/x--1/(x+3)]+1/3[1/(x+3)--1/(x+6)]+1/3[1/(x+6)--1/(x+9)]=1/(x^2+18)1/x--1/(x+9)=3/(x^2+18)(x+9)

35/127/124/151/18

x-3分之5-x方-9分之x-2+2x-6分之x-1=5/(x-3)-(x-2)/(x^2-9)+(x-1)/2(x-3)=(10(x+3)-2(x-2)+(x-1)(x+3))/2(x+3)(x-3

9x的2次方分之2+6x分之1-3x分之1=2/(9x²)+1/(6x)-1/(3x)括号加得对吗?=4/(18x²)+3x/(18x²)-6x/(18x²)=

(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)=

原式=1/(x+1)*[(x-3)/(x+3)^2+2/(x+3)]-x/(x+3)(x-3)=1/(x+1)[3(x+1)/(x+3)^2]-x/(x+3)(x-3)=3/(x+3)^2-x/(x+

再问：再答：

9分之1=3分之x-6分之19分之1乘9=3分之x乘9-6分之1乘91=3X-2分之33X=-3分之2-1X=-9分之2-3分之1X=-9分之5

原式=1/(x-3)-1/2(x+3)-x/(x-3)²=[2(x+3)(x-3)-(x-3)²-2x(x+3)]/[2(x+3)(x-3)²]=(2x²-18

X(X+3)分之1+(X+3)(X+6)分之1+(x+6)(X+9)分之1=2(X+9)分之33{1/x-1/(x+3)+1/(x+3)-1/(x+6)+1/(x+6)-1/(x+9)}=3/(2(x

(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(x+3)分之1+(x+3)(x+6)分之1+(x+6)(x+9)分之1+(x+6)(x+9)分之1+...+(x+99)(x+102)分之1=1/3[x(x+3)分之3+(x+3)(x+6)分之3

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(

就知道问