The sum of the ages of a man and his wife is 6 times the sum of the ages of their children. Two years ago the sum of their ages was 10 times the sum of the ages if their children that time. After 6 years the sum of their ages will be 3 times the sum of the ages of their children. How many children do they have?
They have three children whose sum of ages is 14 and the sum of the ages of man and his wife is 84.