2(x+3)/5=3/2x-2(x-7)/3 怎么算?

7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出 7x(x-6)+3x=4x(2x+5)怎么解这个方程 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 2x+3x+4x+5x+x+6x+7x=100 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 2(x-1)(x+5)-3(x-2)-4x=2x的平方+7方程题怎么算? |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| X-40%X+1200=2/3X怎么算 (2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1 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 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),