8x-3/8=9.5

3x+5x=8x.3x+5x=(3+5)X=8x

4,8-x=3x(x4.8-x=3×(x+6)4.8-x=3x+183x+x=4.8-184x=-13.2x=-13.2÷4x=-3.3

8x(x-5)=3x我试试

x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7x=?x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+71+1/(x+1)-1-1/(x+3)=1+1/x+5)-1-1/(x+7)1/(x+1)+1/(x+7)=1

X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 

x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊

8x+3(x-2)=5x+(x-3)8x+3x-6=5x+x-311x-6x=35x=3x=3/5

X+0.5X=3X-0.8X=8X+0.5X=31.5X=3X=3/1.5X=2X-0.8X=80.2X=8X=8/0.2X=40

3.268=3X()+2X()+6X()+8X()3.268=3X(1)+2X(0.1)+6X(0.01)+8X(0.001)0.1723.268=3X(1)+2X(0.1)+6X(0.01)+8X(0.001)3.268=3X(1)+2X

x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x)前面多项式提取公因式x就有前面两个式子合并为：x(x²-6x-9-x²+8x+15)=x(2x+6)=2x(x+3);然后与后面的式子合并同类项,即提取公因

3X*X-2X+6=8,X=?3X*X-2X+6=8，X=？则代数式1.5X*X-X+1=?(1+根号7)/3或(1-根号7)/31.5X*X-X+1=2也就是3X*X-2X-2=0利用公式，得X=3分之[1加减（7开方根）]3x^2-2x

初二分式方程x+3/x+4+x+8/x+9=x+4/x+5+x+7/x+8解(x+3/x+4)+(x+8/x+9)=(x+4/x+5)+(x+7/x+8)(x+3)/(x+4)+(x+8)/(x+9)=(x+4)/(x+5)+(x+7)/(

解方程：（x-8）/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)[（x-8）(x-4)-(x-9)(x-3)

解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)通分得[（x-8）(x-4)-(x-9)(x

解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)两边分别通分：{(x-8)(x-4)-(x-

问（x-8）/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(/是分数线)X是多少?这个式子可化为X*X+10X+21=X*X-12X+32解方程可得X=0.5解题过程我就不写了,要的话就留言,或者问老师

(x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8(x+1)/(x+2)+(x+8)/(x+9)=(x+2)/(x+3)+(x+7)/(x+8)[1-(1/(x+2))]+[1-

解方程x+1\x+2+x+8\x+9=x+2\x+3+x+7\x+8(x+1)/(x+2)+(x+8)/(x+9)=(x+2)/(x+3)+(x+7)/(x+8)(x+2-1)/(x+2)+(x+9-1)/(x+9)=(x+3-1)/(x+

x+2/x+3－x+1/x+2=x+8/x+9－x+7/x+8(x+2)/(x+3)-(x+1)/(x+2)=(x+8)/(x+9)-(x+7)/(x+8)(x+2)²/[(x+2)(x+3)]-(x+1)(x+3)/[(x+2)

证明(x+1)(X+3)(x+5)(x+7)+15=(X"+8x)"+22(x"+8x)+120证明：(x+1)(x+3)(x+5)(x+7)+15=[(x+1)(x+7)]*[(x+3)(x+5)]+15=[(x^2+8x)+7)]*[(