x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x=?guo cheng
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x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x=?guo cheng
x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x=?
guo cheng
x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x=?guo cheng
x-2[x-3(x+3)-5]=3[2x-8(4-x0]-2 x-2(x-3x-9-5)=3(2x-32+8x)-2 x-2(-4x-14)=3(10x-32)-2 x+8x+28=30x-96-2 9x+28=30x-98 21x=126 x=6
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x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3)
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x(x-2)-2x(x+1)-3x(x-5) 其中x=负½
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
x^5-2x^3+x=?
写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4
x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
(x+3x+5x...+2009x)-(2x+4x+6x+...+2010x)
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x/x-3-5x/x^2-x-6计算
x^5-x^4+x^3-x^2+x-1