Answer:
-3x+1
Step-by-step explanation:
just do what it said and you'll get the answer
So it is really easy to solve firstly we can see how much does the first 10 boxes make which makes around 75$ obviously. Secondly 55$ for the next 10 boxes.
So for now we can simply calculate that we have spent around 130$ which means 20 boxes. The remaining money left is 18$ so we can buy 18/4.5 = 4 only 4 boxes with that money. Hence a total of 24 boxes.
All you have to do is find the relationships between the top and bottom and then find how they all r in common
