[0.05x+0.2]/0.03-x={0.3[0.5x+2]}/0.2
1-0.5x/0.3-2/3x=0.3x/0.2x+1
0.2x+0.5/0.5-0.03+0.02x/0.03=1 x-1/0.3-x+2/0.5=1
0.2x+0.5/0.5--0.03+0.12x/0.3=x-6/2
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
0.2x^2-0.3x+0.5-0.1x^2+0.7x-0.11怎么算?
解方程0.5x+2/0.3-x=0.2(0.5x+2)/0.2-11/12
0.05分之0.04X+0.04-0.3分之0.3X+0.2=2分之X-5
0.05分之0.04X+0.09-0.3分之0.3X+0.2=2分之X-5
(X+4)/0.2-(X-3)/0.5=0.2 x-(x-1)/6=3-(x+2)/3 x/12-(2x-1)/20={
(0.3分之x-1)-2x=0.05分之0.1x+0.2
0.3分之x+1-2x=0.05分之0.1x+0.2