x-1.5/0.5=1-(0.4x+1)/(0.2)
x-2/0.2-x+1/0.5=3 x=?
(1)3x(x+0.2)=4x(x-1.1)
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+x)除以0.2减去(0.4x-0.5)除以0.2=0.5,问x等于多少
解方程:1+0.4x=0.2(x+10) 2.x÷2=x+200
30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1
1-0.5x/0.3-2/3x=0.3x/0.2x+1
先化简再求值先化简再求值:(x-x/x+1)(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5
y=(x+3)(x+3-0.5x^2-x+1.5)*1/2 最大值
(3x-1)/0.5=(4-x)/0.3+(3x+5)/1.5 x得多少?
(X+4)/0.2-(X-3)/0.5=0.2 x-(x-1)/6=3-(x+2)/3 x/12-(2x-1)/20={
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x