2X-1分之2X加X-2分之X=2-搜答案-搜搜做题作业网

2/x+3/(x+2)=1两边乘x(x+2)2x+4+3x=x²+2xx²-3x-4=0(x-4)(x+1)=0x=4,x=-1分式方程要检验经检验,x=4,x=-1是方程的解

(x^2-3x+1)/(x^2-4)=30/(x+2)(x^2-3x+1)/(x-2)=30x^2-3x+1=30x-60x^2-33x+61=0x=(33±√1333)/2

(x^2-3x+1)/(x^2-4)=30/(x+2)(x^2-3x+1)/(x-2)=30x^2-3x+1=30x-60x^2-33x+61=0x=(33±√1333)/2

原方程为:x+x\2+1-x+x\4+3=x+x\6+5-x+x\8+7整理得：3x\4+4=7x\24+12两边同时乘以24,得18x+96=3x+288,x=12.8

x减2分之x加1加x加1分之1等于1方程两边同时乘以(x-2)(x+1),得(x+1)²+(x-2)=(x-2)(x+1)则x²+2x+1+x-2=x²-x-2则4x=-

你这个题目稍微有点乱啊……如果我看的不错的话应该是这样——（5x+2)/(x^2+x)=3/(x+1)其中x不等于0和-1交叉相乘得（5x+2)(x+1)=3(x^2+x)整理得2x^2+4x+2=0

答：1）x/(x^2-x)+2=2x/(x+1)1/(x-1)=2x/(x+1)-2=-2/(x+1)-2x+2=x+13x=1x=1/3经检验,x=1/3是原分式方程的解2）x/(x+1)-1=3/

x分之1加2x分之1加3x分之1等于多少(1/x)+(1/2x)+(1/3x)解,得：==(6/6x)+(3/6x)+(2/6x)==11/6x

2/3x+1/4x=3.38/12x+3/12x=3.311/12x=3.3x=3.3x12/11x=0.3x12x=3.6

2/(x+3)(x-3）+(x-2)/x(x-3)=1/x(x+3)两边乘x(x+3)(x-3)2x+x^2+x-6=x-3x^2+2x-3=0(x+3)(x-1)=0x+3在分母,不等于0所以x=1

x(1/1×2+1/2×3+1/3×4+1/4×5)=1x(1-1/2+1/2-1/3+1/3-1/4+1/4-1/5)=1x(1-1/5)=1x(4/5)=1x=5/4

原式=[(x+2y)/(x+y)]×[xy/(x+2y)]÷[(x+y)/xy]=[(x+2y)/(x+y)]×[xy/(x+2y)]×[xy/(x+y)]=x²y²(x+2y)/

x+2分之2x减2=x-2分之1加4-x分之x+14左右两边同×（x+2）(x-2)(4-x)得：（2x-2）(x-2)(4-x)=(x+2)(4-x)+(x+14)(x+2)(x-2)2(x-2)&

(x-3)分之x-(x^2-3x)分之(x+6)+x分之1等于几?=x²/x(x-3)-(x+6)/x(x-3)+(x-3)/x(x-3)=(x²-x-6+x-3)/x(x-3)=

题目描述不清12应为x

1+1/(x+2)+1+1/(x+3)=1+1/(x+4)+1+1/(x+1)1/(x+2)+1/(x+3)=1/(x+4)+1/(x+1)1/(x+3)-1/(x+4)=1/(x+1)-1/(x+2

2x-(x+1)/2=2+(x+1)/2两边乘24x-x-1=4+x+13x-x=4+1+12x=6x=3

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