#### Explanation:

Lets see, lets try to put this problem in a formula.
For every 3 pounds of butter you have, you have to pay $3.85 Therefore the equation will be: $3.85=3n

You then have to divide the 3 on both sides in order to isolate the $n$

($3.85)/3=(3n)/3 $1.28=n

Your final Answer and the price per butter is \$1.28