If Milly gives Billy $60 the money they have is in the ratio 2:1; however, if Billy gives Milly $10 the ratio is 1:3.
How much money have Milly and Billy before they exchange any money?
Milly $620 Billy $220
Milly 620 – 60 = 560 Milly 620 + 10 = 630
Billy 220 + 60 = 280 Billy 220 – 10 = 210
