0.2:0.5 = X:
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
1-0.5x/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+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4x[这个x是乘】2.5=3.6 3x+5x=
x-0.2x=80 求x
4X+0.5X=13.5X
X-X×0.2=1.18
(1)3x(x+0.2)=4x(x-1.1)
2x-0.8×2.6=3.08-2x 2.4×0.2x=0.5x-2.4 5(0.2x-2.5)=2.1x
x+0.5x=30
0.2x+0.4x=12 x=?20x+x=420 x=?