The total cost of 6 pencils and 2 copybooks is Rs 45.00
1 pencil and 1 copybook cost Rs 16,50
What is the cost of one pe

1 thought on “The total cost of 6 pencils and 2 copybooks is Rs 45.00<br />1 pencil and 1 copybook cost Rs 16,50<br />What is the cost of one pe”

1. Step-by-step explanation:

   let pencils be x and copybooks be y

   6x+2y=45—–eqn1

   x+y=16.50—–eqn2

   multiply eqn2 by 6

   6x+6y=99

   subtract above eqn and eqn1

   -4y=-54

   y=54/4=13.50

   sub in eqn2

   x=16.50-13.50=3.00

   so cost of one pencil=Rs 3.00

   cost of one copybook=Rs 13.50

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