Fill in the blanks in units, decimal units or unit equations. (Eg 3 u OR 1.2 u OR 1 u + 2)

Adam, Bryan, and Charlie have some beads.
After Adam's number of beads is doubled,
Bryan's number of beads is increased by 15 and
Charlie's number of beads is reduced by 9,
the ratio of the number of stickers of Adam to Bryan to Charlie becomes the same.

Let the number of beads that Adam has in the end be 1 u.

1. Number of beads that Adam has at first = _____
2. Number of beads that Bryan has at first = _____
3. Number of beads that Charlie has at first = _____
4. Total number of beads that they have at first = _____

	Adam	Bryan	Charlie
Before	0.5 u	1 u - 15	1 u + 9
Change	x 2	+ 15	- 9
After	1 u	1 u	1 u

(a)
Change information into units.

Number of beads that Adam has at first
= 1 u ÷ 2
= 0.5 u

(b)
Number of beads that Bryan has at first = 1 u - 15

(c)
Number of beads that Charlie has at first = 1 u + 9

(d)
Total number of beads that they have at first
= 0.5 u + 1 u - 15 + 1 u + 9
= 0.5 u + 1 u + 1 u - 15 + 9
= 2.5 u - 6

Answer(s): (a) 0.5 u; (b) 1 u - 15; (c) 1 u + 9; (d) 2.5 u - 6