9x+10=14x

(x-10)/(x-11)+(x-16)/(x-17)=(x-12)/(x-13)+(x-14)/(x-15)快,急用两边减去2(x-10)/(x-11)-1+(x-16)/(x-17)-1=(x-12)/(x-13)-1+(x-14)/(

1.(x+7)/(x+6)+(x+9)/(x+8)=(x+10)/(x+9)+(x+6)/(x+5)2.已知：-x+13/（x-5)(x+3)=A/(x-5)-B/(x+3).求A,B3.已知abc=1,求a/(ab+a+1)+b/(bc+

(x+7/x+6)+(x+9/x+8)=9x=(x+10/x+9)+(x+6/x+5)(x+7/x+6)+(x+9/+x+8)=(x+10/x+9)+(x+6/x+5)(x+9/+x+8)-(x+10/x+9)=(x+6/x+5)-(x+7

(10(9-x)+x)-(10x+9-x)=-9[10(9-x)+x]-(10x+9-x)=-9[90-9x]-9x-9=-918x=90x=5(10(9-x)+x)-(10x+9-x)=-990-10x+x-10x-9+x=-918x=9

[10(9-x)+x]*{10x+(9-x)]=2430[10(9-x)+x]*[10x+(9-x)]=2430[(90-10x)+x]*[10x+9-x]=2430(90-9x)*(9x-9)=2430[9(10-x)]*[9(x-1)]

10x+[13-x]+9=10[13-X]+X10X+13-X+9=(13-X)*10+X10X+13-X+9=130-10X+X9X+22=130-9X18X=130-2218X=108X=613-X+10X+9=130-10X+X22+

1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解?这是等比数列,可以看做F(X)=(X)^(N-1)求和公式S(N)=1*（1-X^N）/(1-X)=17.7(n=11)

解方程：(x+7/x+6)+(x+9/x+8)=(x+10/x+9)+(x+6/x+5)(x+7)/(x+6)+(x+9)/(x+8)=(x+10)/(x+9)+(x+6)/(x+5)(x+6+1)/(x+6)+(x+8+1)/(x+8)=

(X+7)/(X+6)+(X+9)/(X+8)=(X+10)/(X+9)+(X+6)/(X+5)将原方程变形为:(X+9)/(X+8)-(X+10)/(X+9)=(X+6)/(X+5)-(X+7)/(X+6)即:[(X+9)^2-(X+10

解方程X+7/X+6+X+9/X+8=X+10/X+9+X+6/X+5X+7/X+6+X+9/X+8=X+10/X+9+X+6/X+5移项后得7/x+9/x-10/x-6/x＝9+5-8-6（7+9-10-6）/x＝00/x＝0所以x为不等

(x+7/x+6)+(x+9/+x+8)=(x+10/x+9)+(x+6/x+5)(x+7/x+6)+(x+9/+x+8)=(x+10/x+9)+(x+6/x+5)(x+9/+x+8)-(x+10/x+9)=(x+6/x+5)-(x+7/x

(x+6)/(x+5)+(x+10)(x+9)=(x+7)/(x+6)+(x+9)/(x+8)(x+6)/(x+5)=(x+5+1)/(x+5)=(x+5)/(x+5)+1/(x+5)=1+1/(x+5)同理1+1/(x+5)+1+1/(x

x-4/x-6+x-8/x-10=x-5/x-7+x-7/x-9(x-10+2)/(x-10)+(x-6+2)/(x-6)=(x-7+2)/(x-7)+(x-9+2)/(x-9)1+2/(x-10)+1+2/(x-6)=1+2/(x-7)+

14(x-8)(x+16)=4x(x+16)+10x(x-8)解方程14(x-8)(x+16)=4x(x+16)+10x(x-8)7(x²+8x-128)=2x²+32x+5x²-40x7x²+56x

1/(x-1)x+1/x(x+1)+.+1/(x+9)(x-10)=?1/(X-1)X=1/(X-1)-1/X1/X(X+1)=1/X-1/(X+1)所以原式=1/(X-1)-1/X+1/X-1/(X-1).-1/(X+10)=1/(X-1

12x-10/21+7x-9/20=2-x/15+8x-9/14移项,得：12x+7x+x/15-8x=2-9/14+10/21+9/20,合并同类项,得：(166/15)x=959/420.系数化为1,得：x＝959/4648.

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550120x=5

解方程,写出步骤6x+7+5x=1813x+14-5x=3010x-8+4x=109x-9-7x=75x+6+4x-3=169x+6-3x-5=712x-6-3x-5=71/2x+1/3-1/3x=150％x-0.3+1/5x=0.45/6

解方程,写出步骤6x+7+5x=1813x+14-5x=3010x-8+4x=109x-9-7x=75x+6+4x-3=169x+6-3x-5=712x-6-3x-5=71/2x+1/3-1/3x=150％x-0.3+1/5x=0.45/6

x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-16x=30x*x-7x-15求x,可以只要答案.如图,全是正方形,一个边长为1,一个边长为4,求总面积,你也可以用你的方