3又5分之3X减X等于4分之一-搜答案-拍题作业网

1/(x-1)-1/(x-2)=1/(x-3)-1/(x-4)1/(x-1)+1/(x-4)=1/(x-2)+1/(x-3)通分(2x-5)/(x²-5x+4)=(2x-5)/(x²

6加10分之7X等于10,求X.6+7/10x=107/10x=10-6x=40/7百分之20X减5分之1等于5分之4,求X.20%x-1/5=4/520%x=4/5+1/5x=54分之1X加3分之1

四分之3x减八分之一等于二分之一3x/4=1/2+1/83x/4=5/83x=5/2x=5/6

x减9又9分之2等于4又5分之一x-83/9=21/5x=21/5+83/9x=189/45+415/45x=604/45x=13又19/45

x+1/6=3/8x=3/8-1/6x=5/24x=24分之5

列式;mx/2-3/5=x/2-3/4有：x(m-1)=-3/10因为m取什么整数所以当m不等于1时x有解

X=(1/2+1/2)/2=1/2X=1/3+1=4/3X=1/6*2/3=1/9

=8.2+1.8*0.4-1.5*0.6=8.2+1.8*0.4-1.5*（0.4+0.2）=8.2+1.8*0.4-1.5*0.4-1.5*0.2=8.2+（1.8-1.5）*0.4-1.5*0.2

x-3xy-Y分之3x+5xy-3y==(3x+5xy-3y)/(x-3xy-Y)=(5+3*(1/y-1/x))/(-3+(1/y-1/x)).分子分母同时除以xy=(5-21)/(-3-7).将x

5/4-x=5/6-2/65/4-x=1/2-x=-3/4x=3/4

=[(x+3)-(x+2)]/(x+2)(x+3)+[(x+4)-(x+3)]/(x+3)(x+4)+[(x+5)-(x+4)]/(x+5)(x+4)=1/(x+2)-1/(x+3)+1/(x+3)-

x+6分之1x＝4x+1/6x=47/6x=4x=24/7x-7分之2x＝6分之3x-2/7x=1/25/7x=1/2x=7/103x+4分之3x＝7又2分之115/4x=15/2x=25又4分之1x

(1)、4/5x+2/5=3/54/5x=3/5-2/54/5x=1/5x=1/5÷4/5x=1/4(2)、1/5+8x=1/28x=1/2-1/58x=3/10x=3/10÷8x=3/80(3)、x

x÷9分之4=3分之一x=1/3×4/9x=4/276分之5x+75%=45/6x=3.25x=3.97-50%x=50.5x=2x=4

1/x-1/y=5通分(y-x)/xy=5y-x=5xyx-y=-5xy原式=[3(x-y)+5xy]/[(x-y)-3xy]=(-15xy+5xy)/(-5xy-3xy)=-10xy/(-8xy)=

x-4分之一x=8分之33x/4=3/8两边乘以86x=3x=3/6=0.5x-0.8x＝220.2x＝22x＝22/0.2x＝110

上下同乘33xy=y-x代入替换掉3xy加减下约掉x-y得13/7

等式左侧通分（x-6-x）/x(x-6)=1/3x-6/x(x-6)=1/3xx方-6x=-18xx方+12x=0x(x+12)=0x=0或-12依题意x不等于0所以x=-12

7/10:4/5=X:1/37/10*5/4=X*3即3X=7/8X=7/24