Question

Cost of 5 books and 4 note-books is Rs. 100. If the cost of one book
Rs. 12. find the cost of one note-book.​

Answer 1

let cost of 1 notebook be ₹'x'

5(12)+4(x)=100

4x=40

x=10

Answer 2

$\huge\underline\mathrm{Solution-}$

Let the cost of one notebook be x

According to the question :

$5 \times 12 + 4 \times x = 100$

$60 + 4x = 100$

$4x = 100 - 60$

$4x = 40$

$x = 10$

$\huge\underline\mathrm{Answer-}$

Cost of one notebook is Rs. 10