Question

PLZZ HELLP!!!!!!!!!!!!!!!!!!!!!

You are buying boxes of cookies at a bakery. Each box of cookies costs $4dollar sign, 4. In the graph below, c represents the number of boxes of cookies you buy, and d represents the amount the cookies will cost you (in dollars).
The relationship between these two variables can be expressed by the following equation:
d=4c
Suppose the boxes of cookies cost you $80
How many boxes of cookies did you buy?

Answer 1

To find how many boxes of cookies you bought by using the equation, you will try to isolate c. Therefore, you will replace d by $80 (80=4c).
So, to isolate C, you will need to divide both c and 80 by 4.
80/4=20
4c/4=c
Therefore, you bought 20 boxes of cookies.
I hope this makes sense.