In chest A there are three times as many coins as in chest b altogether there are 120 coins how many coins are there in chest B?

there are 30 coins in chest B...3/4 of the total are in A and 1/4 of the total are in B. So you divide 120 by 4 and get 30. So 30 x 3 = 90 = A, and 30 x 1 = 30 = B