Question

A lending library has a fixed charge for the first three days and an additional charge for each day thereafter. Aarushi paid Rs 27 for a book kept for seven days. If fixed charges are Rs x and per day charges are Rs y, write the linear equation representing the above information.

Answer 1

Let fixed charges for first 3 days = Rs x

and additional charges for each day = Rs y

Total period = 7 days

and amount charges = Rs 27

$\therefore x+(7-3)\times y=27\Rightarrow x+4y=27Hencex+4y=27$