Moe bought a box of cookies. He had a dozen more at home. When he divides them among six people, each gets 7. How many in a box?
+180 We don't know how many cookies there are in a box so let's just assume that there are "x" cookies in the box.
He has a total of x+12 cookies.
We can create an equation like this (x+12)/6 = 7
It is divided by six because he divides the total cookies to six people and it equals to seven because each gets 7 cookies.
We can cancel out the fraction so we mutiply (x+12)/6 x 6 = 7 x 6
Giving us x + 12 = 42
Therefore x = 30
Hope this helps! 
