8. Lucy's Cookies is a store that sells only high-end cookies infused with the best materials and created by one of the most renowned bakers in the city. For this establishment, the total variable costs to produce a box of cookies are $100. The materials used to create a box of cookies costs $30 (eggs, milk, butter, and flour). It costs $14 per hour to bake the cookies. There are no additional costs to produce and sell the cookies. Based on this information, how many hours does it take to bake the cookies?

I already have the answer.

Variable costs for a box of cookies are $100

Costs for cookies per box are $30

$14/wages per hour

$100=( X hours* $14 ) + 30

$100-$30=$14*X

X=5

My question is, how did 'we find out' that the answer is 5? I feel like I missed a step. Also, I'm not sure if the tutors can do this, but if you have more questions like these, I would appreciate it so I can practise! Thanks!