4.9÷(7 2-5X)=0.8
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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)
5x-18.5=03.5x=18.8x=3.766x7-6x=9.642-6x=9.66x=32.4x=5.43.4x-48=26.83.4x=74.8x=2242x+25x=13467x=134x=
2x+6=5x5x-2x=63x=6x=26x-28=2x6x-2x=284x=28x=78(x-3.6)=0.8x8x-0.8x=28.87.2x=28.8x=415x-110+7x=11015x+
(5x*0.85+9(66-x)*0.8)/(5x+9(66-x))=1-0.18(4.25x+7.2*(66-x))/(5x+9(66-x))=0.824.25x+7.2*(66-x)=(5x+9(
2x=12.6x=6.3
15X-2.5=11.515X=11.5+2.515X=14X=14/15;3(x+2)=39X+2=39/3X+2=13X=13-2X=11x-(3/5)x=6/5(5/5-3/5)x=6/5(2/
奥数:1.1/422.568by王羲之再问:解方程题列式计算哪去了奥数的计算哪去了完整了选为满意答案再答:1.0.05x*7/10=0.8x=160/72.0.05x-3.7=21.3x=5003.2
16再问:写出过程再答:80/5=16
=x/(x+2)-x(x+2)/(x-5)÷(x+1)=x/(x+2)-x(x+2)/(x-5)(x+1)=[x(x-5)(x+1)-x(x+2)(x+2)]/(x+2)(x-5)(x+1)=(-8x
数理答疑团为您解答方程两边同乘以5得:5x-x=124x=12x=3
(5x+14)÷(x+2)==(5x+14)/(x+2)最简形式,不要再算了再问:[(x+2)²+2(x+2)(x-2)-3(x+2)(x-3)]÷(x+2)=?化简再答:[(x+2)&su
x÷2+x÷5+x÷6=1066可以写作x/2+x/5+x/6=1066则方程两边同时乘以30得,15x+6x+5x=31980,26x=31980,x=1230再问:不明白再问:为什么两边同时乘以3
(0.8x+0.9)÷0.5=(x+5)÷2+(0.3x-0.2)÷0.31.6X+1.8=0.5X+2.5+X-2/34.8X+5.4=1.5X+7.5+3X-20.3X=0.1X=1/3
4×(0.8+x)=723.2+4x=724x=72-3.24x=68.8x=68.8÷4x=17.28x+2x=31.410x=31.4x=31.4÷10x=3.14(x+1.8)÷4=2.5(x+
#includesintjiesheng(intn)//用于计算阶乘如:3!{if(n=1)rerunn;returnn*hh(n-1)}doubledigui(intn,intx)//用以计算y=x
第一题:x-x/5=2.45x-x=124x=12x=3第二题:12/5%x=8240x=8x=1/30第三题:4x+x=12.55x=12.5x=2.5
两边同乘xx-5=20%x两边同乘55x-25=x两边同减x4x-25=0所以4x=25x=25/4=6.25