Question

a leading library has a fixed charge for3days and an additional charge for each day Saritha paid ₹27for book kept for 7days while susy paid ₹21for book kept for 5days find fixed charge and charge for extra day​

Answer 1

Answer:

The fixed charge is Rs. 15

The charge for extra day is Rs. 3

Step-by-step explanation:

Let the fixed charges = x

and the charge for each extra day = y

So, x+4y=27 -------eq(1)

x+2y=21--------------eq(2)

sub eq (2) from (1)

x+4y=27

-x-2y=-21

=> y=3

put the value of y in eq(1)

x+4(3)=27

x=27-12

x=15