x+1/0.2-12-x/0.5=23
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
(X+4)/0.2-(X-3)/0.5=0.2 x-(x-1)/6=3-(x+2)/3 x/12-(2x-1)/20={
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
x-2/0.2-x+1/0.5=3 x=?
(1)3x(x+0.2)=4x(x-1.1)
x/2+x/8+x/12+x/20=1
0.2x+(1-0.25)*0.2x+12=0.5x怎么解
0.2x+0.4x=12 x=?20x+x=420 x=?
解方程:2x(x-1)-x(3x+2)=-x(x+2)-12
x/2+x/6+x/12+x/20+x/30+x/42=1
1-0.5x/0.3-2/3x=0.3x/0.2x+1
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550