Question

A man is given a penny, and he is told that for every night that he sleeps with that penny under his pillow it will double. The man tries it the first night, and the next morning notices that the penny in fact doubled, and now he has two pennies, y , he would have after x amount of days, which of the following equations would give him his answer?

Answer 1

yx=the amount of pennies.

Explanation:

The question states that x is how many days, and that y is how many pennies. If the amount of pennies y is double the amount of days, x, then the answer above should be the correct answer.