①X+1/2X+1/8X=120

来源：学生作业帮编辑：搜搜考试网作业帮分类：数学作业时间：2024/07/03 15:02:11

①X+1/2X+1/8X=120
②2/3X+1/2=12

①X+1/2X+1/8X=120
(1+1/2+1/8)X=120
13/8 X=120
X=120*8/13
X=960/13
②2/3X+1/2=12
2/3X=12-1/2
2/3X=23/2
x=23/2 * 3/2
X=69/4
再问：刚才错了- -应该是 X+1/2X+1/8X=130
再答： X+1/2X+1/8X=130 (1+1/2+1/8)X=130 13/8 X=130 X=130*8/13 X=80
再问：不好意思，下面一题也写错了- -2/3X-1/2=12，我会给你加分的。

解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 x/2+x/8+x/12+x/20=1 X-5+8*X=7*X-2*X-1 y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), (3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1 x+2/x+3－x+1/x+2=x+8/x+9－x+7/x+8 x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)谁会解这道方程题分式方程.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)怎样解这道方程