x+3x-(9x+30x)=98

x+3x-(9x+30x)=98 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+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 计算：(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9 (x^2-3x+1) (x^2+3x+2)( x^2-9x+20)= -30求X 3*X*X*X+3*X*X-3x-9=0 x=? X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 3X+30+X+X-15=? x+35=(x+3x)*30% (x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8 (16x-13)/(4x-3)-(20x-24)/(4x-5)=(32x-30)/(8x-7)-(40x-43)/(8x-9)求x (x+30)*(x-18)=x*x x×x+3x-9/ x+2 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+X)+(X-X)+(X*X)+(X/X)=100 x-(30-x)=(30-x)-x/3,怎么解