0.2x+0.5/0.5--0.03+0.12x/0.3=x-6/2（0.2x+0.5)/0.5-（0.03+0.12x)/0.3=（x-6)/2
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0.2x+0.5/0.5--0.03+0.12x/0.3=x-6/2（0.2x+0.5)/0.5-（0.03+0.12x)/0.3=（x-6)/20.2x+0.5/0.5--0.03+0.12x/0.
0.2x+0.5/0.5--0.03+0.12x/0.3=x-6/2（0.2x+0.5)/0.5-（0.03+0.12x)/0.3=（x-6)/2
0.2x+0.5/0.5--0.03+0.12x/0.3=x-6/2
（0.2x+0.5)/0.5-（0.03+0.12x)/0.3=（x-6)/2
0.2x+0.5/0.5--0.03+0.12x/0.3=x-6/2（0.2x+0.5)/0.5-（0.03+0.12x)/0.3=（x-6)/2
(0.2x+0.5)/0.5=0.4x+1
（0.03+0.12x)/0.3=0.1+0.4x
原式左边=0.4X+1-(0.1+0.4X)=0.4X+1-0.1-0.4X=0.9
则0.9=（X-6）/2
X-6=1.8
X=7.8
x=28.86
X=7.8
给个括号啊
x-30-0.2x=0.5x
0.02x-0.01/0.03-0.4x+0.2/0.5-3X+2/4=-3求x
0.5/0.2x+0.5=4+0.03/0.03+0.02x
解方程.（0.5x+2)/0.03-x=[0.3(0.5x+2)]/0.2解方程.（0.5x+2)/0.03-x=[0.3(0.5x+2)]/0.2
0.2x+0.5/0.5--0.03+0.12x/0.3=x-6/2（0.2x+0.5)/0.5-（0.03+0.12x)/0.3=（x-6)/2
0.4x-2.1/0.5-0.5-0.2x/0.03=0.6
0.5x+2/0.03-x=0.3(0.5x+2)/0.20.5x+2/0.03-x=0.3(0.5x+2)/0.2
3分之2X+1=1 0.2X+0.5-0.03+0.02X=2分之X-5 0.03分之0.1X-0.2-0.5分之2X+1=3 6【X-2（X-1]）】=2（X-3
(0.4x-2.1)/0.5=(0.1+0.2x)/0.03-0.6
(0.4x-2.1)/0.5=(0.1+0.2x)/0.03-6
(0.4x-2.1)/0.5=(0.1+0.2x)/0.03-0.6
(0.2x+0.5)/0.5-(0.03+0.02x)/0.03=(x-5)/2
0.2x+0.5/0.5-0.03+0.02x/0.03=x-5/2
(0.5x+2)/0.03-x=0.3(0.5x+2)/0.2-10又12分之11
0.5x+2/0.03-x=0.3(0.5x+2)/0.2
解方程（一元一次,（0.3x - 0.2)/0.5 - (0.02+0.01x)/0.03=0
[0.05x+0.2]/0.03-x={0.3[0.5x+2]}/0.2
0.4x+0.9/0.5-0.03-0.02x/0.03-x-5/2=0