Question

A librarian has 4 times as many mystery books as romances. She lends out 12
mysteries. How many mystery books does she have now if she started with 15
romances

Answer 1

Answer: Ans=58

Step-by-step explanation:

let romances=x

let mysteries=4x

∴In the start- romances=15

                    -mysteries=4×15=60

(She lends out 12 mysteries)

∴60-12=58

Ans=58

Answer 2

Answer:

48

Step-by-step explanation:

let's considered romance book = X

then mystry book = 4X

so,

here X= 15,

4X = 4*15

= 60

mystry book left = 60 - 12 = 48