Adam has $15$ of a certain type of rare coin and is interested in knowing how much this collection is worth.  He discovers that $5$ of these coins are worth $12$ dollars in total. Assuming that the value of each coin is the same, how many dollars is his entire collection worth?
Question:
Adam has $15$ of a certain type of rare coin and is interested in knowing how much this collection is worth.  He discovers that $5$ of these coins are worth $12$ dollars in total. Assuming that the value of each coin is the same, how many dollars is his entire collection worth?
Answer:
Let's think step by step.

user
36
Adam has $15$ of a certain type of rare coin and is interested in knowing how much this collection is worth.  He discovers that $5$ of these coins are worth $12$ dollars in total. Assuming that the value of each coin is the same, how many dollars is his entire collection worth?
train