Adam has some red stickers and green stickers.
If Adam receives another 710 green stickers,
the red stickers will be 20% as many as the green stickers.
If Adam receives another 74 red stickers,
the red stickers will be 80% as many as the green stickers.

1. How many red stickers are there? 
2. How many green stickers are there? 

	Scenario 1		Scenario 2
	Red	Green	Red	Green
Before	1 u	5 u - 710	4 p - 74	5 p
Change	No change	+ 710	+ 74	No change
After	1 u	5 u	4 p	5 p

(a)
20% = ²⁰₁₀₀ = ¹₅
80% = ⁸⁰₁₀₀ = ⁴₅

Scenario 1
Number of red stickers at first = 1 u
Number of green stickers at first = 5 u - 710

Scenario 2
Number of red stickers at first = 4 p - 74
Number of green stickers at first = 5 p

1 u = 4 p - 74 --- (1)
5 u - 710 = 5 p --- (2)

(2) _{÷ 5}
1 u - 142 = 1 p
1 u = 1 p + 142 --- (3)

(1) = (3)
4 p - 74 = 1 p + 142
4 p - 1 p = 74 + 142
3 p = 216

1 p = 216 ÷ 3 = 72

Number of red stickers
= 4 p - 74
= 4 x 72 - 74
= 288 - 74
= 214

(b)
Number of green stickers
= 5 p
= 5 x 72
= 360

Answer(s): (a) 214; (b) 360