1/2[2x-1/3(10-7x)]-1/2x-1/3[x-1/2(x+1)]=3
x-1/6(10-7x)-1/2x-1/3x+1/6(x+1)=3
6x-10+7x-3x-2x+x+1=18
9x=27
x=3是对的吗？如果是我会采纳。没错