-2x+3=-10+8x x等于

-2x+3=-10+8x x等于 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 2x(5x+3)=3x(5x+3x)中x等于多少 1X+2X+3X…+98X+99X+100X=50500X X等于多少? (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? x-8=-3x等于多少 3x+5x=?x等于 已知x^2+3x+1=0,那么x^3+8x+20等于 8X-2分之1X=3分之1X-1,X等于多少, 1/(x+10)+1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+9)(x+10)=2,x等于多少? y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),