the price of a pen is 9 rupees more than the price of a pencil. The price of a book is 8 rupees more that the price of a pen. Total price of 12 pens and 12 pencils are equal to the total price of 9 books. find the price of pen, pencil, and a book?
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Let the cost of one pencil be x. Then Cost of one pen =x+9.
And cost of one book =x+9+8
Now A/Q
12 (x+9)+12x=9 (x+9+8)
12x+108+12x=9x+81+72
24x-9x=153-108
15x=45
x=46/15
x=3
Now 1 pencil cost = 3
1 pen cost =3+9=12
1 book cost =12+8=20.
I hope it help you.
Now 1 pencil cost =
And cost of one book =x+9+8
Now A/Q
12 (x+9)+12x=9 (x+9+8)
12x+108+12x=9x+81+72
24x-9x=153-108
15x=45
x=46/15
x=3
Now 1 pencil cost = 3
1 pen cost =3+9=12
1 book cost =12+8=20.
I hope it help you.
Now 1 pencil cost =
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