-3 2/5b-1 1/20b = -3 1/10 + 1 4/5 -2 7/20

Question

-3 2/5b-1 1/20b = -3 1/10 + 1 4/5 -2 7/20

Answer 1

-3 2/5b-1 1/20b = -3 1/10 + 1 4/5 -2 7/20
-4 8/20b-1/20b=-3 1/10+1 8/10-2 7/20
-5 9/20b=-1 3/10-2 7/20
-109/20b=-3 6/20-7/20
b=-3 13/20:(-109/20)
b=73/20*20/109
b=73/109