5x+7x-7x+5x=10.x得多少

5x+7x-7x+5x=10.x得多少 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? f(x)=2X—5X十7,f(X+1),得多少 x+5/7x=6 x x等于多少 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. x+1/x+2 + x+6/x+7 =x+2/x+3 + x+5/x+6 多少了! （3X的平方+X-5）-（4-X+7X的平方）得多少? *-----------------------------------------------*| 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 || 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 7X+9=7*5/8*X+8*3/8*X得多少? 7x-3=6x-5(x得多少?)解方程 解分式方程(5-2x)/(x^2-x-12)=5x/(x^2+x-6)+(10-7x)/(x^2-6x+8)得 x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少 5x+12=7x-18,x=多少 解方程1/(x+x﹚+1/(x+3x+2﹚+1/(x+5x+6﹚+1/(x+7x+12﹚=4/21得 (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 2x+3x+4x+5x+x+6x+7x=100 x+7x-4x=多少?