Alana and petra go to a used book sale, where every book is the same price. alana buys 4 books and petra buys 2 books. they run into their friend angus, who really loves to read, and discover that he has bought 16 books. angus received a $15 discount, but he still spent $5 more than alana and petra combined. how much does one book cost? $2.00 $24.50 $1.00 $2.50

A book cost $2.00

Step-by-step explanation: Given the no of books purchased by

Alana =4          Petra =2       Angus = 16

So

The total price of 4 books of Alana =4x$

Total price for Petra = 2x$

Total price of Alana and Petra =4x+2x

=6x$

Total price for Angus = 16x$

But given Angus received a discount  of $15

So price post discount = 16x- 15

According to the question

16x-15 = 6x +5

Adding 15 both sides

16x +15-15 = 6x + 5+15

16x= 6x+20

Subtracting 6x both sides

16x - 6x = 6x - 6x + 20

10x = 20

i.e x=2

Cost of one book = $2

can you rephrase the question ? it is unclear : -)

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.