Question

a lending library has a fixed charges for the first 3 days and an additional charge for each day there after Aarushi paid $27 for a book kept it for 7 days if the fixed charges are x and the per day charges y why write a linear equation representing the above information

Answer 1

let fixed charges =x,additional charges per day =y.ATQ-x+4y=27

Answer 2

Let the fix charges be - x
And the charges afterwards be - y
Since book was kept for 7
=> 7-3 = 4 (book was kept for 4 days extra)
=> x+4y=27