2X+(2X-13)+5[100-X-(2X-13)]求解这个方程,2X+(2X-13)+5[100-X-(2X-13)]=200

*-----------------------------------------------*| 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-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 计算:[(x+2)/(x+3) - (x+1)/(x+2) + (x+4)/(x+5) - (x+3)/(x+4) / (x^2 + 7x + 13)/(x^2 + 8x + 15) [(x+2)/(x+3)-(x+1)/(x+2)+(x+4)/(x+5)-(x+3)/(x+4)]/[(x的平方+7x+13)/(x的平方+8x+15)] x+2x+3x+.+100x 3(x^4)^6-2(x^5×x^3)^3+x^11×x^13+x^20×x^3×x 解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x) 1x+2x+3x+4x+5x+6x+7x…+99x=100 (2x-5)*(2x-5)+(3x+1)(3x+1)>13*(x*x-10) (x-2)(x-3)+2(x+6)(x-5)-3(x^2-7x+13) (X-2)(X-3)+2(X+6)(X-5)-3(X^2+7X+13) 计算(x-2)(x-3)+2(x+6)(x-5)-3(x平方-7x+13) (3x-2)(x-3)-2(x+6)(x-5)+3x(-7x+13) 2X+(2X-13)+5[100-X-(2X-13)]求解这个方程,2X+(2X-13)+5[100-X-(2X-13)]=200 (x-5)(x-2) (x-5)(x+2)