Adam, Charlie and Bryan have some marbles.
After Adam's number of marbles is doubled,
Charlie's number of marbles is increased by 4 and
Bryan's number of marbles is reduced by 2,
the ratio of the number of stickers of Adam to Charlie to Bryan becomes 8 : 4 : 3.
Let the number of stickers that Bryan has in the end be 3 u.
- Number of marbles that Adam has at first = _____
- Number of marbles that Charlie has at first = _____
- Number of marbles that Bryan has at first = _____
- Total number of marbles that they have at first = _____