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

Bryan, Adam, and Charlie have some stickers.
After Bryan's number of stickers is doubled,
Adam's number of stickers is increased by 19 and
Charlie's number of stickers is reduced by 12,
the ratio of the number of stickers of Bryan to Adam to Charlie becomes the same.

Let the number of stickers that Bryan has in the end be 1 u.

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

	Bryan	Adam	Charlie
Before	0.5 u	1 u - 19	1 u + 12
Change	x 2	+ 19	- 12
After	1 u	1 u	1 u

(a)
Change information into units.

Number of stickers that Bryan has at first
= 1 u ÷ 2
= 0.5 u

(b)
Number of stickers that Adam has at first = 1 u - 19

(c)
Number of stickers that Charlie has at first = 1 u + 12

(d)
Total number of stickers that they have at first
= 0.5 u + 1 u - 19 + 1 u + 12
= 0.5 u + 1 u + 1 u - 19 + 12
= 2.5 u - 7

Answer(s): (a) 0.5 u; (b) 1 u - 19; (c) 1 u + 12; (d) 2.5 u - 7