0.5+3(1-0.2X)> 0.4X-0.6

x-2/0.2-x+1/0.5=3 x=? 求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13 (1)3x(x+0.2)=4x(x-1.1) 0.1x-3\0.2+0.3x+0.5\0.6=x-1\3 1-0.5x/0.3-2/3x=0.3x/0.2x+1 (X+4)/0.2-(X-3)/0.5=0.2 x-(x-1)/6=3-(x+2)/3 x/12-(2x-1)/20={ 3x-x-5x -6+0.6b-26b 2(4x-0.5) -3(-6分之1x) -3+(2x-2)-3x+5) 写过程 1/2X^3-1/4X+0.2X^2+0.25x-0.5x^3-1/5x^2的值与x无关 1、0.3X-0.4X=0.5 2、5X-2.5X+3.5X=-18 3、X-2/5X=-3+6 2-(1-x)=-3、3(x-3)=2x-1,0.4x-3(20-0.2x)=3, 解方程:2- x+5/6=x- x-1/3,0.1-0.2x/0.03-1=0.7-x/0.4 x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)