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Thirty-one books are arranged from left to right in order of increasing prices. The price of each book differs by $2 from that of each adjacent book. The price of the book at the extreme right is equal to the price of the middle book plus a book adjacent to the middle one. Give an expression for the cost of the th book in terms of .

 Apr 23, 2021
edited by Dennis070sinneD  Apr 23, 2021
 #1
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+2

X=lowest number

 

extreme right=x+60

 

middle = x+30

 

x+60=x+30+x+32 

or

x+60=x+30+x+28

 Apr 23, 2021
 #2
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+3

thx :)

Dennis070sinneD  Apr 23, 2021

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