2xƽ-2x=5ùʽ

x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4

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解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+

(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2(x+12)(x-2)+(x+7)(x+

x(x-2)-2x(x+1)-3x(x-5)其中x=负½x(x-2)-2x(x+1)-3x(x-5)其中x=负½x(x-2)-2x(x+1)-3x(x-5)其中x=负½x

(x-3/x-2)-(x-2/x-1)=(x-5/x4)-(x-4/x-3)(x-3/x-2)-(x-2/x-1)=(x-5/x4)-(x-4/x-3)(x-3/x-2)-(x-2/x-1)=(x-5

x-2x+3x-4x+5x.+99x-100x=25求解x-2x+3x-4x+5x.+99x-100x=25求解x-2x+3x-4x+5x.+99x-100x=25求解x(1-2+3-4+...+99

2x+3x+4x+5x+x+6x+7x=1002x+3x+4x+5x+x+6x+7x=1002x+3x+4x+5x+x+6x+7x=1002x+3x+4x+5x+x+6x+7x=10028x=100x

x(x+1)+(x+2)+(x+3)+(x+4)+(x+5)=27求xx(x+1)+(x+2)+(x+3)+(x+4)+(x+5)=27求xx(x+1)+(x+2)+(x+3)+(x+4)+(x+5)

f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(x,-x)=f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(x,-x)=f(x,-x)=x^2+2x,fx(x,-x

x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7x=?x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7x=?x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7x

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x^5-2x^3+x=?x^5-2x^3+x=?x^5-2x^3+x=?x^5-2x^3+x=x（x^4-2x^2+1）=x（x²-1）²=x（x+1）²（x-1）

写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(

5x/(x-2)-2=3(x-2)/x5x/(x-2)-2=3(x-2)/x5x/(x-2)-2=3(x-2)/x5x/(x-2)-2=3(x-2)/x通分得：5x^2-2x(x-2)=3(x-2)^

7x^2-5x=2x^2+x7x^2-5x=2x^2+x7x^2-5x=2x^2+x7x^2-5x=2x^2+x5x^2-6x=0x(5x-6)=0x=0,x=6/57x^2-5x=2x^2+x5x^

2x(x-1)-x(2x-5)=152x(x-1)-x(2x-5)=15 2x(x-1)-x(2x-5)=152X2次一2X

5/x^2+x-1/x^2-x=05/x^2+x-1/x^2-x=05/x^2+x-1/x^2-x=05/x(x+1)-1/x(x-1)=0可别乘x(x+1)(x-1)5(x-1)-(x+1)=05x

(x^-2x)^-5(x^-2x)-6=0(x^-2x)^-5(x^-2x)-6=0(x^-2x)^-5(x^-2x)-6=0(x^2-2x)^2-5(x^2-2x)-6=0(x^2-2x-6)(x^

(5x-2)*(x+8)=5x*x+98(5x-2)*(x+8)=5x*x+98(5x-2)*(x+8)=5x*x+98(5x-2)(x+8)=5x²+985x²+38x-16=5