x+7x=72

x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)x/(x-2)-(x-8)/(x-6)=(x+1)/(x-1)-(x-9)/(x-7)(x^2

x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,x=4..思路..将第二项移到右边..第三项移到左边..两边分别进行通分化简..做到这步乃就明白了..千万不要两边同时进行化简..很麻烦的..

(x+8)(x+6)(x+7)+(x+5)(x+6)(x+7)=(x+5)(x+8)(x+7)+(x+5)(x+8)(x+6)方程左边=(x+8)(x+6)(x+7)+(x+5)(x+6)(x+7)=(x+6)(x+7)(x+8+x+5)=

如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少应该是-2x²,不是-3x²3x²-x=1原式=9x^4-3x³+15x³-5x²+3x&

17x+13=7x+381.9+0.75x-0.1=x13x-3x=72=12x=309.4x-120=8.4x=17x-20015.2x-0.8=7.4x+70.9x-0.5x+0.28=x+0.117x+13=7x+38移项,得,17x

(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2=x^2+10x-24+x^2+15x+56-x^2+5x+50=x^2+30x+82=4+60+82=146其实,不化简,直接代入=14*0+9*10+7*8

2x+3x+4x+5x+x+6x+7x=1002x+3x+4x+5x+x+6x+7x=10028x=100x=100/28x=25/727x=100x=100/27；；；；；；；；；；；速率可达粉色礼服螺丝钉解放isskl其实我不会2x+3

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+X)+(X-X)+(X*X)+(X/X)=100（X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9因为(9+9)+(9-9)+(9×9)+(9÷9)=100，∴

(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

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-4/x-5-x-5/x-6=x-7/x-8-x-8/x-9求x=?(X-4)/(X-5)-(X-5)/(X-6)=(X-7)/(X-8)-(X-8)/(X-9)[(x-4)(x-6)-(x-5)2]/(x-5)(x-6)=[(x-7)(

已知3x*x-x=1,求6x*x*x+7x*x-5x+20003x*x=1+x得6x*x*x+7x*x-5x+2000=3x^2*2x+7x^2-5x+2000=(1+x)2x+7x^2-5x+2000=9x^2-3x+2000=3(3x^

x-x/7=126x=?很高兴能够在这里回答你的问题,应该为：x-x/7=1266x/7=126x=126*7/6x=147本式即6x/7=126，所以x=126*7/6=147

X>7,x=100x条件值在A1,在B1单元格输入：=LOOKUP(A1,{0;3.5;5;7},{-200;0;100;100})X>7,x=1005

x+7x-4x=多少?x+7x-4x=8X-4X=4X

3x+7x=()+()X()3x+7x=(3+7)Xx=10Xx=0+10Xx=(0)+(10)X(x)0+2*5x

7x-3x+x=607x-3x+x=605x=60x=127x-3x+x=60化简：5x=60x=12

9x+7x-x=4.5不会吧,这个还算错?9x+7x-x=4.515x=4.5x=4.5:15x=0.3小朋友要自己思考一下,不要老想着标准答案.

x+7x-4x=?4X