(10+0.14-3x-x)/7=(10-0.8-3x)/(7+1)怎么解

3x-1+5x=7x+x-3x这个方程怎么解 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 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), 解方程：3/8x+x/4=16 1/5x+x/10=2 3x/11-x/10=7怎么解? 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少 已知x=9/2 求:[(x^+7x+10)/(x^2+6x+5)]×[(x^3+1)/(x^2 7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出 【(x-1)/x】-【(7x-7)/2x】+3=0 怎么解 X+X-10+X-2=36*3怎么解