Nicole and Vincent collect stickers and erasers. Vincent has 70 less stickers than erasers. Vincent has 4 times the number of stickers Nicole has, and Nicole has 20% more erasers than Vincent. After Nicole gives Vincent all of her stickers and Vincent gives Nicole 60% of his erasers, Vincent has 6 less erasers than stickers. Find the number of erasers Nicole has at first.

Nicole		Vincent
Erasers	Stickers	Erasers	Stickers
4.8 u + 84	1 u	4 u + 70	4 u
+ 2.4 u + 42	- 1 u	- 2.4 u - 42	+ 1 u
7.2 u + 126	0	1.6 u + 28	5 u

100%+ 20% = 120% 

120% x 4 u
= ¹²⁰₁₀₀ x 4 u
= 4.8 u

120% x 70
= ¹²⁰₁₀₀ x 70
= 84 

60% x 4 u
= ⁶⁰₁₀₀ x 4 u
= 2.4 u  

60% x 70 
= ⁶⁰₁₀₀ x 70
= 42 

If another 6 erasers are given to Vincent, he will have equal number of erasers and stickers in the end.
5 u = 1.6 u + 28 + 6
5 u - 1.6 u = 34
3.4 u = 34

1 u = 34 ÷ 3.4 = 10

Number of erasers that Nicole has at first
= 4.8 u + 84
= 4.8 x 10 + 84
= 48 + 84
= 132
 
Answer(s): 132