7.2x除以2=16.2
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(8x+9)/(x^2+x-6)=a/(x+3)+b/(x-2)8x+9=a(x-2)+b(x+3)8x+9=(a+b)x+(3b-2a)建立方程组a+b=83b-2a=9得到解a=3b=5
X除以(X-2)+(X-9)除以(X-7)=(X+1)除以(X-1)+(X-8)除以(X-6)(x-2+2/x-2)+(x-7-2/x-7)=(x-1+2/x-1)+(x-6-2/x-6)1+(2/x
(5x-2)/(x-1)+1=(4x+5)/(3x-3)(5x-2+x-1)/x-1=(4x+5)/(x-1)*36x-3=(4x+5)/314x=14x=1
1.6÷2÷x=200.8÷x=20x=0.8÷20x=0.04
x/2+x/3+x/4=6x/12+4x/12+3x/12=13x/12=65所以x=65除以13/12=60
题目是(5x+2)/(x²+x)=3/(x+1)这样吧?∵(x+1)作分母,不为0,可直接约分∴(5x+2)/x=3∴5x+2=3x∴2x=-2∴x=-1
x/2>x/33x>2x3x-2x>0x>0
答:6/x=(1/2)/(1/5)6/x=5/25x=12x=12/5经检验,是原分式方程的根0.2/25=4/x所以:0.2x=4*250.2x=100x=500经检验,是原分式方程的根
有什么问题的亲欢迎向我或者我的团队【定向求助】哦我们将在第一时间内尽力为您解答
我看下是不是这么解设y=x/(x^2-1)原方程可化为:2y^2-3/y=2(y≠0)=>2y^2-2y-3=0(y≠0)然后解出y=(1+根号7)/2或y=(1-根号7)/2这样解出来的答案太复杂了
18400/(1000x)/2=1018400/2000x=1018400=20000xx=18400/20000x=23/25
X÷2=160÷4X÷2=40X=40*2X=80
-0.2X/2=Y/3=Z/-7X/2=Y/33X=2YX=2/3YY/3=Z/-7-7Y=3ZZ=-7/3YX+Y+Z=(2/3Y+Y-7/3Y)/(Y+7/3Y)=(-2/3Y)/(10/3Y)=
去分母:2(x+1)=3(x-1)2x+2=3x-32x-3x=-2-3-x=-5x=5经检验此为原方程的根
x除以2-x除以5=905x-2x=9003x=900x=300
方程两边都乘以6得:3x-2x=36解得x=36
1/(5-x)+2/(4-x)+3/(3-x)=-31/(5-x)+2/(4-x)=3/(x-3)-3[(4-x)+2(5-x)]/[(5-x)(4-x)]=[3-3(x-3)]/(x-3)(14-3
x/6-2=x/96x/36-2=4x/96x/36-4x/36=210x/36=2x=7.2再问:太谢谢你了再答:不用谢,请满意采纳
x除以0.05除以2=(4500-x)除以0.02除以4化简成8x=10(4500-x)是对的,8x=45000-10x18x=45000x=2500
x=10