5 4/8-(n-6 3/8)=2 6/8
5 4/8=5 1/2=11/2 2 6/8=2 3/4=11/4 6 3/8=51/8
n-51/8=11/2-11/4
n-51/8=11/4
n=11/4+51/8
n=73/8=9 1/8
17 27/35-(m+28/35)=10 16/35
m-28/35=17 27/35-10 16/35 17-10+27/35-16/35=7+11/35=7 11/35
m-28/35=7 11/35
m=7 11/35+28/35 7+11/35+28/35=7+39/35=7+1+4/35=6 4/35
m=6 4/35