Tìm x biết

a)x+1/9 =-7/16+1/9
b)1/2.x-3/5=-1/5
c)31/2-1/2.x=2/3
d)5/9.x-1/3.x=1/8+11/9.x
e)x-7/3+x-7/4=x-7/5+x-7/6