3(4x+1)-2(x-3)=3x(x+5)-3x^2-1则x等于

(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+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+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 (-x)1(-x)2(-x)3(-x^4)等于多少 (x+1)(x+2)(x+3)(x+4)等于多少 4x-3(x-5)=2x+(x-1) x等于多少 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值 (x-1)(x-2)(x-3)(x-4)=0,求x等于多少,