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

Aarushi paid Rs 27, of which Rs. x for the first three days and Rs. y per day for 4 more days is given by 

x + (7 – 3) y = 27 

x + 4y = 27 

Above equation represents the linear equation for the given information.