解方程5分之1x=28-搜答案-拍题作业网

x/(1×3)+x/(3×5)+x/(5×7)+...+x/(2007×2009)=2008(x/2)(1-1/3+1/3-1/5+1/5-1/7+...+1/2007-1/2009)=2008(x/

1/x+1/(x+1)=5/2(x+1)左右两边乘以2x*(x+1)2(x+1)+2x=5xx=2

(x-1)/x-(1-x)/(x+1)=5(x-1)/2(x+1),(x-1)/x=5(x-1)/2(x+1)+(1-x)/(x+1)=(5/2-1)(x-1)/(x+1)=3(x-1)/2(x+1)

1/{(x-1)(x-2)}=1/{(x-4)(x-5)}首先,分母不为零,∴x≠1,2,4,5通分：(x-4)(x-5)=(x-1)(x-2)x^2-9x+20=x^2-3x+26x=18x=3

先等号两边相乘1/5x1/x＝1/15x1/3就得到:1/5x＝1/45得出x＝9手机打字不容易采纳吧谢谢再问：像不对，你没有把比好算进去，15分之1:5分之1=x分之1:3分之1再答：这种式子算法就

4/5*x=3/4+5/6-1/24/5*x=9/12+10/12-6/124/5*x=13/12x=13/12*5/4x=65/48（48分之65）

两边同乘以（x^2+1）得5x+2=33(x+1)=33x+3327x=-31x=-31/27

3分之4X=28X=28÷3分之4X=21

30%x=5分之1x3/10x＝1/5x3/10x－1/5x＝01/10x＝0x＝0

原分式方程可变形为；5x+2/x(x+1)=3/x+1分式两边同乘公分母得：5x+2=3x解得：x=1检验：当x=1时,公分母x(x+1)不等于0所以x=1是原分式方程的解(/表示除号）再问：你算错啦

2x²/(x+1)-3(x+1)/x²=-5令a=x²/(x+1)2a-3/a=-52a²+5a-3=0(2a-1)(a+3)=0a=1/2,a=-3x

0.5x=0.6x-50.6x-0.5x-5=00.1x-5=00.1x=5解得x=50

25%x+5分之1x=7.2,0.25x+0.2x=7.20.45x=7.2x=16

两边乘x（x-1）(x-1)²+5x²=6x(x-1)x²-2x+1+5x²=6x²-6x6x-2x=-14x=-1x=-1/4在我回答的右上角点击【

1*3分之x+3*5分之x+5*7分之x+...+2011*2013分之x=2012x/2(1-1/3)+x/2(1/3-1/5)+x/2(1/5-1/7)+...x/2(1/2011-1/2013)

1/5*1/x=1/15*1/31/(5x)=1/455x=1÷1/455x=45x=9

1/5(180-x)=x36-1/5x=xx+1/5x=366/5x=36x=30

x-1/5x=324/5x=32x=32÷4/5x=40x+1/6x=427/6x=42x=42÷7/6x=36

1/（X-7）-1/（X-5）=1/（X-6）-1/（X-4）移项1/（X-7）+1/（X-4）=1/（X-6）+1/（X-5）通分（2x-11)/[(x-7)(x-4)]=(2x-11)/[(x-6