(0.2x+0.5)/0.04+(x-3)/0.6=12x
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
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
(X+4)/0.2-(X-3)/0.5=0.2 x-(x-1)/6=3-(x+2)/3 x/12-(2x-1)/20={
x-2/0.2-x+1/0.5=3 x=?
(1)3x(x+0.2)=4x(x-1.1)
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
0.2x+0.4x=12 x=?20x+x=420 x=?
解方程:2x(x-1)-x(3x+2)=-x(x+2)-12
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
0.04分之0.1X-0.3-X=0.4乘以(0.5X-3)求X
0.1x-3\0.2+0.3x+0.5\0.6=x-1\3
0.2分之3x-0.6=0.5分之2x-1.5-0.1分之x+4.2