Question

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 pencil?​

Answer 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