2x/0.03+0.25-0.1x/0.02=10

(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 x+2x×10=10x+2x+36 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：0.03分支2X + 0.02分支0.25-0.1X =0.1 2x/0.03+0.25-0.1x/0.02=12.5的解, 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 解方程:2- x+5/6=x- x-1/3,0.1-0.2x/0.03-1=0.7-x/0.4 解方程 x=未知数 x-2/3x=15 9/10x+0.1x=0.1 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