2[1-13(x-1+x3)]=3[x6-12(2x-10-7x3)=?急

题目

2[1-13(x-1+x3)]=3[x6-12(2x-10-7x3)=?急

答案

2{1-1/3[x-(1+x)/3]}=3{x/6-1/2[2x-(10-7x)/3]}
2[1-(2x-1)/9]=3[x/6-(13x-10)/6]
2(10-2x)/9=5-6x
20-4x=45-54x
50x=25
x=1/2