2(x+1)-3(2-x)=6(3x-1)
解:2x+2-6+3x=18x-6
18x-2x-3x=2-6+6
13x=2
x=2/13
y-y-1/2=2-y+2/5
解:y-y+y=2+5/2+1/2
y=2+3
y=5
1.2x-0.6/0.2+1.8-1.2/0.3=1
解:12x-3+1.8-4=1
12x=1+3-1.8+4
12x=6.2
12x=31/5
x=31/60
(2x-1):3=7x:4
解:21x=4(2x-1)
21x=8x-4
13x=4
x=4/13
2/13 5 31/60 13/4