(2x-1)÷2-x+2=(5x+2)÷3-(x+3)÷6解方程

*-----------------------------------------------*| 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 || 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^2-3X-2=0,求( x - 2x-1/x )÷(x-1)/(x^2-2x) (x²-x+1)÷(x²-x-1)=(x²+x)÷(x²+x-2)解方程 (-x^2n-2)*(-x)^5÷[x^n+1*x^n*(-x)]=? 化简(x^2-2x+1)/(x^2+1)÷(x-1)/(x^2+x)-x [x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简[x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简 【{x²-4x+4/x²-4}-x/x+2】÷x-1/x+2 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-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)2.2/3+x/(3x-1)=1/9x-3 f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(x,-x)= 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 先化简再求值：[(x-2/x+2)+(4x/x^2-4)]÷(1/x^2-4),其中x=-5