3x乘以x=19200
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![3x乘以x=19200](/uploads/image/f/298609-25-9.jpg?t=3x%E4%B9%98%E4%BB%A5x%3D19200)
(六分之x+八分之x)乘以3=x-707/8x=x-70x-7/8x=701/8x=70x=56015x+13乘以(510-10x)除以13=63515x+510-10x=6355x=635-5105
根号内的数要>=0,所以x-2>=0,3-x>=0,所以2
x/(x²-3x)×(x²-9)=x/x(x-3)×(x-3)(x+3)=x+3
(x+x+三分之一x)乘以3=3087x=308x=440.3x+0.2乘以(160-x)=360.3x+32-0.2x=360.1x=4x=40x+10=40%乘以(36-x+0)x+10=14.4
设a=2^x,b=3^x那么方程是:3a^2+2b^2=5ab(3a-2b)(a-b)=0(1):3a-2b=03*2^x=2*3^x(2/3)^x=2/3x=1(2)a-b=03^x=2^x(3/2
x∈(2,3),f(x)x∈(3,+∞),f(x)是增函数,f(x)>f(3)=0,f(4)=4>3,f(3)=0
(4+x)*(3*2000/x)=6300(4+x)(3*2000)=6300x6000(4+x)=6300x20(4+x)=21x80+20x=21xx=80
说明一下:“*”是乘号15*(3x-8)-4*(2x+3)=6*(4x-4)-4首先,化简,得(15*3x-15*8)-(4*2x+4*3)=6*4x-6*4-4去括号(记的变号),得45x-120-
两边平方后得(x-3)(x+3)=0,由题可知,X.>=3,所以x=3
解:2*[1-1/3(2x-1/3)]=3*[x/6-1/2*(-5x-10/3)]2*[1-2/3+1/9]=3*[x/6+5/2x+5/3]2*[1-2/3*x+1/9]=x/6+5/2*x+5/
由题意得1.4x×0.8-x=151.12x-x=150.12x=153/25x=15x=15×25/3x=125
(2x^3-x+6)乘以(3x^2+5x-2)=6x^5+10x^4-4x^3-3x^3-5x^2+2x+18x^2+30x-12=6x^5+10x^4-7x^3+13x^2+32x-12
2*0.2x-3*0.3x+5*0.4x=0.3*50.4x-0.9x+2x=1.51.5x=1.5x=1
(x-3)(x-m)/|x-3|(m-x)=1(x-3)(x-m)=|x-3|(m-x)(x-3)(x-m)=-|x-3|(x-m)(x-3)=-|x-3|-(3-x)=-|x-3|3-x=|x-3|
题目有点乱,望写细点.如果是x/(x+1)-(x+3)/(x+1)乘以(2x^2+6x)/(x^2+6x+9)则可变成-3*2x/【(x+1)*(x+3)】将x=-1/2代入得:12/5
先同时乘以105/3x+7/4(88-x)=150同时乘以1220x+21(88-x)=1800-x+1848=1800x=48
10x/4-1.2/4-4x/4=4/5*(x/2-6/2)(50x-6-20x)/20=(8x-48)/20所以30x-6=8x-48解x=-21/11
1乘以2分之x+2乘以3分之x+.+2012乘以2013分之x=2012(1-1/2+1/2-1/3+……+1/2012-1/2013)x=2012(1-1/2013)x=20122012/2013x
3.14x=16.56-x移项得3.14x+x=16.564.14x=16.56所以x=4
3X-0.8乘以75%=2.13x-0.6=2.13x=2.1+063x=2.7x=0.9