Alice and Bob have a total of 240 coins. The ratio of the number of coins Alice has to the number of coins Bob has is 3:1 3 : 1\,3:1
Alice gives Bob some coins. The ratio of the number of coins Alice has to the number of coins Bob has is now 1:1 1 : 1\,1:1
Work out how many coins Alice gives to Bob. You must show all your working.
