3分之1X-50%
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 20:49:48
=3/3x-2/3x+x/(3x-2)=1/3x+x/(3x-2)=(3x-2+3x²)/3x(3x-2)=(3x²+3x-2)/(9x²-6x)
一、原式=(1-1/100)×99÷98.01=1×99-1/100×99÷98.01=99-0.99÷98.01=98.01÷98.01=1二、5(x-50)=3(x+70)5x-250=3x+21
3分之X+15分之X+35分之X+63分之X+99分之X=11/2x*(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/10)=11/2x*(1-1/10)=11/2x*9/1
原式得:1/(x-3)=2-x/(x-3)两边同时乘以x-3得:2x-6-x=1x-6=1x=7
x/3+x/5+x/6+148=xx-x/3-x/5-x/6=148x-10x/30-6x/30-5x/30=1489x/30=148x=1480/3=
x+3分之x+x平方-9分之6等于x-3分之1两边乘(x+3)(x-3)x(x-3)+6=x+3x²-3x+6=x+3x²-4x+3=0(x-3)(x-1)=0x1=3x2=1由于
(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6=1/(x-3)+(1-x)/2(x+3)-6/(x+3)(x-3)=[2(x+3)+(1-x)(x-3)-12]/2(x+3)(
x/(1*2)+x/(2*3)+……+x(2003*2004)=x(1/(1*2)+1/(2*3)+……+1/(2003*2004))=x(1-1/2+1/2-1/3……+1/2003-1/2004)
3/(x+1)-3x/(x+1)?=(3-3x)/(x+1)=3(1-x)/(1+x)再问:(x-1)的平方分之三-(x-1)的平方分之3x再答:3/(x-1)^2-3x/(x-1)^2=(3-3x)
5分之3×2分之1-x=5分之1x=3/5*1/2-1/5x=3/10-1/5x=1/103分之2x+50%x=422x/3+x/2=427x/6=42x=42*6/7x=36x-20%x=6.4(1
(x-1)/3-(x+2)/6=(4-x)/2等式两边同乘6得:2(x-1)-(x+2)=3(4-x)去括号:2x-2-x-2=12-3x移项:4x=16x=4
方程吗?两边乘3030x-10(x-1)=45(x-1)-48x30x-10x+10*1=45x-45*1-48x30x-10x+48x-45x=-45-1023x=-55x=-55/23
(x-3)分之x-(x^2-3x)分之(x+6)+x分之1等于几?=x²/x(x-3)-(x+6)/x(x-3)+(x-3)/x(x-3)=(x²-x-6+x-3)/x(x-3)=
1、x-x-1分之1=1X(X-1)=X-1(X-1)^2=0X=1,经检验X=1是增根,原方程无解.2、1-x分之1-2=1-x²分之3x-x²(1+X)-2(1-X^2)=3X
原式=2x/(x^2-4)-1/(2-x)+3/(x+2)=2x/(x-2)(x+2)+1/(x-2)+3/(x+2)=[2x+(x+2)+3(x-2)]/(x-2)(x+2)=(6x-4)/(x-2
0.2分之x+1--0.01分之x+3=50去分母5(x+1)-100(x+3)=50去括号5x+5-100x-300=50合并同类项-95x=345系数化为1:x=-69/19
再问:再答:
两边乘以66得6(x-9)-22(x+2)=66(x-1)-33(x-2)6x-54-22x-44=66x-66-33x+66-49x=98x=-2
(x+1)/(x+2)-1/(x+7)=(x+2)/(x+3)-1/(X+6)(X+2-1)/(X+2)-1/(X+7)=(X+3-1)/(X+3)-1/(X+6)1-1/(X+2)-1/(X+7)=
注:分子/分母(1/x-3)+(1/9-x^2)-(x-1/6-2x)通分:=2(x+3)/2(x+3)(x-3)+12/2(9-x^2)-(x-1)(3+x)/2(3-x)(3+x)=2x+6/2(