解方程:7(2x-1)-3(4x-1)-5(3x 2) 27=0-搜答案-智慧作业帮

4(x^2-7x+10)-(2x+3)(2x-1)=-214x^2-28x+40-(4x^2-2x+6x-3)=-214x^2-28x+40-4x^2+2x-6x+3+21=0-32x+64=0x=2

（x+1）(6x+7)=(2x+2)(3x+4)化简得X=-1

(9x-7)/(3x-2)-(4x-5)/(2x-3)=1(9x-7)(2x-3)-(4x-5)(3x-2)=(2x-3)(3x-2)18x²-41x+21-12x²+23x-10

x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1

(x²-x+4)x-(x-1)(x²+2)=x+7x³-x²+4x-x³+x²-2x+2=x+72x+2=x+72x-x=7-2x=5

Х=1再问：过程？再答：（6x-1）×（2x-5）=（4x-7）×（3x+2）然后拆开，简化最后就得答案了再问：能不能帮忙检验一下，我刚才检验一下，好像不等于1再答：把1带进去，就可以了再问：可代进去

3(4x-1)+5(3x+2)=7(2x-1)+112x-3+15x+10=14x-7+112x+15x+7=14x-627x+7=14x-627x-14x=-6-713x=-13x=-1

方程两边同时乘以x²-1:(3x²+9x+7)(x-1)-(2x²+4x-3)(x+1)-(x³+x+1)=03x^3+9x^2+7x-3x^2-9x-7-(2

9x+7/3x+2-4x+5/2x+3=154x+14x+12-24x+15x+18=659x=-24x=-24/59

3x【7-2x】+5x【2x-1】=4x【x-3】+5621x-6x^2+10x^2-5x=4x^2-12x+5628x=56x=2x的n次方【x的n次方+9x-12】-3【3x的n+1次方-4x的n

两边乘124(2x+1)-3(3x-2)=2(4x-7)-12x8x+4-9x+6=8x-14-12x8x-9x-8x+12x=-14-4-63x=-24x=-8

19.3-5x=2x+3-7x=0x=020.7(2x-1)-3(4x-1)=4(3x+2)-114x-7-12x+3=12x+8-12x-4=12x+7-10x=11x=-11/10

21x-6x^2+10X^2-5x-4x^2+12x-56=028x-56=0x=21/9x^2y^2*(2yx^2-xy^2-2yx^2+2xy^2)=(1/9x^2y^2)*xy^2=1/9x^3

首先由题意得x+1≠0,x+7≠0,x+5≠0,x+3≠0,即x≠-1,x≠-7,x≠-5,x≠-3,则先简化方程(x+1+1)/(x+1)+(x+7+1)/(x+7)=(x+5+1)/(x+5)+(

两边乘(x+1)(3x+4)(2x+3)(3x+4)=(x+1)(6x+7)6x²+17x+12=6x²+13x+717x-13x=7-124x=-5x=-5/4

把方程乘开,就很容易了,最后答案是10

(1/x-7)+(1/x-1)=(1/x-6)+(1/x-2)1/(X-7)-1/(X-6)=1/(X-2)-1/(X-1)(X-6-X+7)/[(X-7)(X-6)]=(X-1-X+2)/[(X-1

x=2/15再问：需要过程！谢谢！再答：3x+0.5-5x+0.5=2-7x-1/3-2x+1=5/3-7x5x=2/3x=2/15

-14/13

x=28再问：写清楚解答过程啊再答：25/28x=x-33=x-25/28x3=3/28xx=3*28/3x=28