What could be the value of x in the equation x/2+ 15 =64

Can someone check if i did this correct. it’s number 4 if you’re wondering.

According to the data set, where should the upper quartile line of the box plot be placed?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?