4/5×(-5/4) 4/5X(-25/6)X(-7/10) (-24/13)X(-16/7)X0X4/3 5/4X(-1.2)X(-1/9) (-3/7)X(-1/2)X(-8/15)过程4/5×(-5/4) 4/5X(-25/6)X(-7/10) (-24/13)X(-16/7)X0X4/3 5/4X(-1.2)X(-1/9) (-3/7)X(-1/2)X(-8/15)求过程 速度 急啊真的!过程啊

*-----------------------------------------------*| 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 || x-2x+3x-4x+5x.+99x-100x=25求解 4x-5=25-9x+x 求x? 通分x+4/x*x+4x与x-5/x(x-5)-2(x-5) (x+2)(x的平方-2x+4)+(x-5)(x+5x^2+25)化简 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 (x+3x+5x...+2009x)-(2x+4x+6x+...+2010x) x^5-x^4+x^3-x^2+x-1 x^6-x^5+x^4-x^2+x-1 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X x^2+2x-8/x^3+25x+x/(x-2/x-x+4/x+1,其中x=-4/5 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6 3x·x-5x-122x·x·x-x·x-4x+3x·x·x-6x-5x·x+6x+64x·x+12x+7 解方程：（2x+5)(4x*x-10x+25)=8x(x*x+1) 如下9*9宫图如何填x x x 1 x x x 2 9x x 5 x x x x x 4x 6 8 x x x x x xx x x 7 x x 5 x xx 2 x x 6 x x 8 xx x 3 x x 9 x x xx x x x 5 x 1 6 x 4 x x x 3 x x x x 7 x x x x 2 x x x 解分式方程：4/5x+x/(5x-25)=5/(x^2-5x) x-1分之x²+5x - x²-x分之2x²+4x