x/x-2=2/x-2 5/x+2=5/2x 5-x/x-4+1/4-x=1 3-x/1-x-1=2/x

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x/x-2=2/x-25/x+2=5/2x5-x/x-4+1/4-x=13-x/1-x-1=2/xx/x-2=2/x-25/x+2=5/2x5-x/x-4+1/4-x=13-x/1-x-1=2/xx/

x/x-2=2/x-2 5/x+2=5/2x 5-x/x-4+1/4-x=1 3-x/1-x-1=2/x
x/x-2=2/x-2 5/x+2=5/2x 5-x/x-4+1/4-x=1 3-x/1-x-1=2/x

x/x-2=2/x-2 5/x+2=5/2x 5-x/x-4+1/4-x=1 3-x/1-x-1=2/x
x/x-2=2/x-2
1-2=2/x-2
1=2/x
x=2
5/x+2=5/2x
2=5/2x-5/x
2=5/2x
4x=5
x=5/4
5-x/x-4+1/4-x=1
5-1-4+1/4-x=1
1/4-x=1
x=1/4-1
x=-3/4
3-x/1-x-1=2/x
3-x-x-1=2/x
2-2x=2/x
2x-2x²=2
x²-x=-1
x²-x+1/4=1/4-1
(x-1/2)²=-3/4
无实数解
x-1/2=±√3i/2
x=1/2±√3i/2

x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 x(x-2)-2x(x+1)-3x(x-5) 其中x=负½ (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) 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 f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(x,-x)= x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x 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 5x/(x-2)-2=3(x-2)/x 7x^2-5x=2x^2+x 2x(x-1)-x(2x-5)=15 5/x^2+x - 1/x^2-x=0