A chocolate manufacturer makes boxes of chocolates in three different sizes.
Delicious
chocs
Delicious
chocs
Delicious
chocs
Box A
Box B
Box C
Box A contains c chocolates.
Box B contains 4 more chocolates than Box A.
Box C contains twice as many chocolates as Box B.
Altogether there are 60 chocolates.
Work out how many chocolates there are in each box.