0.2分之3加0.2X减去0.01分之0.2加0.03X等于0.75-搜答案-智慧作业帮

x+3/4-1-x/12=x/43（x+3）-（1-x）=3x3x+9-1+x=3x3x+8+x=3x3x-3x+x=8x=8题目是不是这么理解的啊

你的问题有点不详细.你是问2x/3+1-10x/6+1=1还是(2x+1)/3-(10x+1)/6=1如果是前者：2x/3+1-10x/6+1=1(4x+6-10x+6)/6=1.（公分母）-6x+1

∵x^2-3x+1=0显然x不等于0∴x-3+1/x=0∴x+1/x=3∴x^2+1/x^2+2=9∴x^2+1/x^2=7∴原式=1/(x^2+1+1/x^2)=1/(7+1)=1/8

4/5-x+1/3=5/6x=4/5+1/3-5/6x=3/10

(x-4)/0.2-2.5=(x-3)/0.0510(x-4)/2-2.5=100(x-3)/5通分,得50(x-4)-25=200(x-3)化简,得150x=375x=2.5

4（x+y)-3(x-y)=14x+7y=14(x+y)/2+(x-y)/3=6两边同乘以6,得3(x+y)+2(x-y)=365x+y=36则x+7(36-5x)=14x=7,y=1

即1/(x+3)+1/(x-3)=1/(x+3)(x-3)两边乘(x+3)(x-3)x-3+x+3=1x=1/2经检验,x=1/2是方程的解再问：对不起题目打错了。。呵呵是x加3分之1减去3减x分之2

即1/(x+3)+2/(x-3)=12/(x+3)(x-3)两边乘(x+3)(x-3)x-3+2x+6=123x=9x=3经检验,x=3时分母x-3=0是增根舍去所以方程无解

3(2x-1)=6-(x+2)6x-3=6-x-27x=7x=1(2x-1)/3=(3x+5)/22(2x-1)=3(3x+5)4x-2=9x+15-5x=17x=-17/5

根号下大于等于0x²-4>=0,x²>=44-x²>=0,x²

x-(x-1)/2=2-(x+2)/3等式两边同时乘以6得6x-3(x-1)=12-2(x+2)6x-3x+3=12-2x-43x+3=8-2x5x=5x=1

3x^2-4x+6=93x^2-4x=3x^2-4/3x=1x^2-4/3x+6=1+6x^2-4/3x+6=7

(x-3)/0.15-(x+4)/0.2=1.6,两边同时乘以3得,20(x-3)-15(x+4)=4.8,5x-120=4.8解得x=24.96

先将此方程的分母化为整数,再按解方程的步骤依次进行计算即可．原方程可化为：（8x-3）-（25x-4）=12-10x,去括号得：8x-3-25x+4=12-10x,移项、合并同类项得：-7x=11,系

原式=x(x-9)/x(x+3)-(x+3)(x-3)/(x-3)²=(x-9)/(x+3)-(x+3)/(x-3)=(x²-12x+27-x²-6x-9)/(x+3)(

0.2分之(3+0.2X)-0.01分之(0.2+0.03X)=0.7515+X-20-3X=0.752X=-5.75X=-2.875

（2x+1）/3-（5x-1）/6=1两边乘64x+2-5x+1=6-x=3x=-3

(x+1)/0.2+(3x-1)/0.4=12(x+1)+(3x-1)=0.45x+1=0.45x=-0.6x=-0.12