x÷(7 11) x÷(11-7)=13.2÷60

[（x+2）/（x*x-2x）-（x-2）/（x*x-4x+4）]/[(x-4)/x]=[（x+2)/x(x-2)-(x-2)/(x-2)²]/[(x-4)/x]=[(x²-4-x

=（x+1）(x-1)(x+1)x-1--------------÷------×-----(x-1)^2(x-1)x+1=x+1---x-1

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

(x+1-1/1-x)÷(x-x²/x-1)=[(x+1)+1/(x-1)]×[-(x-1)/x(x-1)]=(x²-1+1)/(x-1)×(-1/x)=-x/(x-1)(x-4/

解题思路：分式的混合运算，按照分式运算法则进行计算。解题过程：

分数W反了吧换位1/（10）-1/（9）=1/（7）-1/（-6）通过共享：1/（X-9）（X-10）=1/（X-7）（X-6）（X-9）（X-10）=（-7）（X-6）X^2-19X+90=X^2-

x^2*x^3+x^7÷x²=x^5+x^5=2x^5、【（x-y)²+（x+y)(x-y)]÷2x=(x-y)(x-y+x+y)÷2x=(x-y)*2x÷2x=x-y

=[(x+3)(x-3)-7]/(x-3)2(x-3)/(x²-8x+4²)=2(x²-4²)/(x-4)²=2(x+4)(x-4)/(x-4)&su

1.25-x=2.8x=25-2.8=22.22.36÷x+9=036÷x=-9x=36÷(-9)=-43.33x=79-x34x=79x=79/34【可以写成2又11/34】4.5x-(11-7)=

先化简去掉中括号：(1-x+x-1/x)÷(1-1/x-1)再化简：(1-1/x)÷(-1/x)=(1-1/x)x(-x)=1-x

(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)=2（x-3)/(x-2)^2X(x+3)^2/(3-x)X(2-x)/(x+3)=2（x-

原式=[(3x^4+3x²)-(11x³+11x)+(2x²+2)+2x+5]÷(x²+1)=3x²-11x+2+(2x+5)/(x²+1)

2x/(x-2)(x+1)÷(1－x/x+1)-x²+2x/x²-4?=2x/(x-2)(x+1)×(x+1)/(1-x)-x(x+2)/(x+2)(x-2)=2x/(x-2)(1

(2-x)/(x²-9)[1+(2x-7)/(x²-4x+4)]÷1/(x+3)=(2-x)/[(x+3)(x-3)](x²-2x-3)/(x-2)²×(x+3

原式化简：{（x-3)(x-2)/(x-3)(x-4)}²÷{(x+1)(x+2)/(x-4)(x+2)}²{(x-2)/(x-4)}²÷{(x+1)/(x-4)}

（3x)²x(3x）^7÷(3x)^6÷(3x)³=(3x)^9÷(3x)^6÷(3x)³=(3x)^3÷(3x)^3=1请点击下面的【选为满意回答】按钮,

(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2=(x-y)^7÷(x-y)^6+[-(x+y)^3]÷(x+y)^2=(x-y)+[-(x+y)]=x-y-x-y=-2y

x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)=x((2x-1)/x)+x/(x^2-2x)x(x^2-4)/(3-x)=(2x-1)+(x+2)/(3-x)=(7x-3-2x^2

5x÷8-3x=405x-24x=320-19x=320x=-320/197x-8=42+3x7x-3x=42+84x=40x=109x+7-3x=9x-39x-3x-9x=-3-7-3x=-10x=

=(x-2)/(x+3)(x-3)×(x²+2x-3)/(x-2)²×(x+3)/(x+1)=(x-2)/(x+3)(x-3)×(x-3)(x+1)/(x-2)²×(x+