Answer:
66
Step-by-step explanation:
Use the combination formula.
<em>Greetings from Brasil...</em>
Before comparing mixed fractions, let's make them inappropriate
2 1/2 = 5/2
3 1/3 = 10/3
Comparing fractions. (MMC - Maximum Common Multiple -<em> I don't know that term in English</em>)
2 1/2 = 5/2 = 15/6
3 1/3 = 10/3 = 30/6
30/6 > 15/6 then
<h2>
3 1/3 > 2 1/2</h2>
Brett cannot spend more than $30, so the cost of the books and the shipping charge have to be less or equal to $30, we can express this as in an inequality, like this:

Where n is the number of books purchased, since each book costs $4, 4 times n equals the total cost of the books and 2 is the shipping charge. We can solve for n in the inequality like this:

Then, brett can afford no more than 7 books.
Answer:
1x
Step-by-step explanation:
first you do 2-4= 2 then 2-3= 1 and then you put the x
so 3x-(2-4x)=1x