解方程:x+3/x+2-x+5/x+4=x+7/x+6-x+9/x+8 请写的容易懂
来源:学生作业帮 编辑:拍题作业网作业帮 分类:数学作业 时间:2024/04/26 15:16:07
解方程:x+3/x+2-x+5/x+4=x+7/x+6-x+9/x+8 请写的容易懂
:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
1+1/(x+2)-1-1/(x+4)=1+1/(x+6)-1-1/(x+8)
1/(x+2)-1/(x+4)=1/(x+6)-1/(x+8)
2/(x+2)(x+4)=2/(x+6)(x+8)
2(x+2)(x+4)=2(x+6)(x+8)
(x+6)(x+8)=(x+2)(x+4)
x^2+14x+48=x^2+6x+8
8x=-40
x=-5
再问: 第二步是怎么来的??
再答: (x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8) {(x+2)+1}/(x+2)-{(x+4)+1}/(x+4)={(x+6)+1}/(x+6)-{(x+8)+1}/(x+8) 1+1/(x+2)-1-1/(x+4)=1+1/(x+6)-1-1/(x+8)
1+1/(x+2)-1-1/(x+4)=1+1/(x+6)-1-1/(x+8)
1/(x+2)-1/(x+4)=1/(x+6)-1/(x+8)
2/(x+2)(x+4)=2/(x+6)(x+8)
2(x+2)(x+4)=2(x+6)(x+8)
(x+6)(x+8)=(x+2)(x+4)
x^2+14x+48=x^2+6x+8
8x=-40
x=-5
再问: 第二步是怎么来的??
再答: (x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8) {(x+2)+1}/(x+2)-{(x+4)+1}/(x+4)={(x+6)+1}/(x+6)-{(x+8)+1}/(x+8) 1+1/(x+2)-1-1/(x+4)=1+1/(x+6)-1-1/(x+8)
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
解分式方程 x-7/x-9+x-3/x-5=x-4/x-6+x-6/x-8
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
求方程解x-5/x-4+x-9/x-8=x-8/x-7+x-6/x-5
解分式方程:(x-4)/(x-5)+(x-8)/(x-9)=(x-7)/(x-8)+(x-5)/( x-6)
解分式方程(X-4)/(X-5)-(X-5)/(X-6)=(X-7)/(X-8)-(X-8)/(X-9)
解方程:(x-4)/(x-5)-(x-5)/(x-6)=(x-7)/(x-8)-(x-8)/(x-9)
解方程:x-4/x-5 -x-5/x-6=x-7/x-8 -x-8/x-9
解因式方程:x-4/x-5+x-8/x-9=x-7/x-8+x-5/x-6
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)