x-0.4x=120

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x-0.4x=120
120/x=180/1.2x x=?

X=0或者+∞

x+4x=x+120这个方程怎么解?

x+4x=x+120x+4x-x=1204x=120x=30(等号最好对齐写)

计算x-2/5x+120=3/4x

x-2/5x+120=3/4x0.6x+120=0.75x0.15x=120x=800

方程x-0.4x+360:x=3:

(0.6x+360):x=3:40.2x+120=1/4x0.8x+480=xx=2400再答:x:60%x+360=4:31/4x=20%x+120x=0.8x+480x=2400再答:小意思再问:

X-0.4X=36

X-0.4X=360.6X=36X=60

(X+X)+(X-X)+(X*X)+(X/X)=100

(X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问:请问X(X+2)=99解为什么就等于9了呢没看懂再答:换成算术法你就明

x+2x+2x*2=120怎么解

如果我没理解错,而你的题目又是正确,我又没算错的话,那么会有:x+2x+2x*2=1202x*2+3x-120=0根据公式a(x+b/2a)^2=(b^2-4ac)/4a求得x=-987/16一般最好

0.2x+0.4x=12 x=?20x+x=420 x=?

0.2x+0.4x=120.6x=12x=12÷0.6x=2020x+x=42021x=420x=420÷21x=20

X+120%X=44 30%X-18=54

2.2x=44,x=200.3x=54+18=72,x=240

解方程 5X+5X+5X+5X+2X²=120

2x²+20x=120x²+10x=60x²+10x+25=60+25(x+5)²=85x+5=±√85x=-5-√85,x=-5+√85

X乘以X减X除以X=120,X=?

(X*X-X)/X=120X²=121XX=121或X=0(舍去)所以X为121

0.4x+3.2=2.5x+0.05 X是多少

0.4x-2.5x=0.05-3.22.1x=3.15x=1.5

50X+40X×(2.5X)=120 怎么解?

50X+40X×(2.5X)=12050X+100X=120150X=120X=120/150X=0.8

x(120+x)*80%=x-76

需要过程?再问:嗯嗯*^O^*再答:数有点大稍等再问:好的好的^W^再答:问题没错?再问:没错再问:算不出来么?再答:整理出来4x^2+475x+380=0再问:那估计是数抄错了还是要谢谢你^W^

X[X/(Y+X)+X/(X-Y)]=120/288

没法解,化简得:x[2x^2/(x^2-y^2)]=120/288若x=ty;则有t^2y/(t-1)=60/288.无穷解若方程为:X/(Y+X)+X/(X-Y)=120/288x^2/(x^2-y

用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.

#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

2x+0.4x=48(并检验) 8x-x=14.7 35x+13x=9.6

2x+0.4x=48(2+0.4)x=48x=48/2.4x=20(并检验)2×20+0.4×20=40+8=488x-x=14.7(8-1)x=14.7x=14.7/7x=2.135x+13x=9.

x+x=x+15

2x等于x+15x等于15

(3x*x+3x*x+x*x)*2=120,

7x²*2=120x²=60/7x=-2√105/7,x=2√105/7