0.2x (35-x)0.5=10 怎么解方程

0.13x-0.13=0.07x+0.070.13x-0.07x=0.13+0.070.06x=0.2x=20/6(二十分之六）都乘以6030x-10x+7.5x-6x=43/6021.5x=43/6

是这样的：x^5+x^4=x^3(x^2+x)=(x^2+x)[(x^3-1)+1]=(x^2+x)(x^3-1)+x^2+x=[x(x+1)(x-1)](x^2+x+1)+x^2+x=(x^3-x)

[x-x/(x+1)][(x+1)/(x^2+4x+4)][(x^2-4)/(x^2-2x)]=[x^2/(x+1)][(x+1)/(x+2)^2][(x+2)(x-2)/x(x-2)]=x/(x+2

2+x=2x+1；两边减去x;2=x+1;两边减去1；1=x;即x=1;;0.5x=3.4+x;两边减去0.5x;0=3.4+0.5x;两边减去3.4；-3.4=0.5x;两边乘以2；-6.8=x;即

0.2x+0.2*15=0.5-x/3+7/30.2x+x/3=0.5+7/3+3(8/15)x=35/6x=35/6÷8/15x=175/16

1-0.5x/0.3-2/3x=0.3x/0.2x+1原方程为：1-5/3x-2/3x=3/2+1解之：1-7/3x=5/27/3x=1-5/2x=-3/2x3/7x=-9/14

x/2（1/1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)=1x/2*10/11=110x=22x=11/5这回的方法是你想要的了吧

0.2x>0.3x+1-0.1x>1x

(6x+5)-2x=16x+5-2x=14x=-4∴x=-1再问：你的答案是正确的再答：请采纳

f(f(f(x)))=x/(1+3x^2)^0.5f(f(x))=f(x/(1+x^2)^0.5)=x/(1+x^2)^0.5/(1+(x/(1+x^2)^0.5)^2)^0.5=x/(1+2x^2)

再答：采纳啊。再答：谢谢。

0.2分之X-2-0.5分之X+1=31/5x-2-1/2x+1=32/10x-5/10x=3+2-1-3/10x=4x=4*(-10/3)x=-40/3

x/x(x-1)+2=2x/(x+1)1/(x-1)+2=2x/(x+1)x+1+2(x-1)(x+1)=2x(x-1)x+1+2x²-2-2x²-2x=0-x-1=0-x=1x=

1x+(50-x)*0.5=35x+25-0.5x=350.5x=10x=20

1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1=(1/2x^2-0.5x^2)+(0.25x-1/4x)+(0.2x^3-1/5x^3)+0.5x-1=0.

∵X=-0.5∴(X-4)(x-2)-2(X-1)(X+3)=x²-6x+8-2(x²+2x-3)=x²-6x+8-2x²-4x+6=-x²-10x+

(2x-5)(3x+2)-6(x+1)(x-2)=6x²+4x-15x-10-6(x²+x-2x-2)=6x²-11x-10-6(x²-x-2)=6x²

你写在本子上嘛把题这题很混乱啊!再问：是两题啊大哥……再答：再答：再问：你确定正确？确定的话我就采纳了

25%x-0.2x=111/4x-1/5x=111/20x=11x=22035%x+1=3.57/20x=2.5=5/2x=5/2*20/7x=50/7x-25%x=110x-1/4x=1103/4x

(1)3x(x+0.2)=4x(x-1.1)3x+0.6=4x-4.44x-3x=0.6+4.4x=5(2)乘以0.8得4(1-x)=3x4-4x=3x4=7xx=4/7（7分之4）（3）1.1x1.