Respuesta :
Answer: it will take 6 months for her collection to have 18 pucks.
Step-by-step explanation:
Let x represent the number of months it will take for her collection to have 18 pucks.
She has 12 pucks already in her collection. She has a friend that works at the stadium that can get her 3 new pucks each month. This means that the number of pucks that she would have after x months is expressed as
12 + 3x
For her to get 18 pucks, the expression would be
12 + 3x = 18
3x = 18 - 12
3x = 6
x = 6/3
x = 2