x=6 so...
I have to buy 100 apples, my friend bought 40 and there is 10 apples in a bag, how many bags of apples will i need to buy?
OR...
I have 40 purses, my goal is to have 100 purses. A store is selling purses in 1 pack of 10, how many packs of purses will i need to buy to get me to 100?