the price of a pen is 9 rupees more than the price of a pencil. the price of a book is 8 rupees more than the price of a pen. total price of 12 pens and 12pencils is equal to the total price of a books. find price of a pencil and a book.
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Here you didn't tell how many books
So I took from another question ie 9 books
one pencil = x
One pen = x + 9
one book = x + 9 + 8 = x + 17
12 pens = 12x + 108
12pencils = 12x
9 books = 9 (x+17) = 9x + 153
12x + 108 + 12x = 9x + 153
15x = 30
x = 2
Pencil = Rs 2
Book = 2 + 17 = 19
Pen = 2 + 9 = 11
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