Question

the price of 3 notebooks and 2 textbooks rupees 135 but a notebook cost rupees 5 more than the notebook find the cost of both the notebook and test book

Answer 1

Hey!!!

___________

Let the cost of 1 notebook be Rs.x and 1 textbook be Rs.y.

Then ATQ,

=> 3x + 2y = 135------(1)

Also

=> x - 5 = y

=> (x - y = 5)2-------(2)

ADD (1) and (2).

=> 3x + 2y + 2x - 2y = 135 + 10

=> 5x = 145

Thus x = 29

Thus y = 24

Thus the cost of 1 notebook is Rs.29 and 1 textbook is Rs.24

__________

Hope this helps you

Answer 2

Solution:-

let ,
notebook = x , textbook = y,

acourding to quetion:-

3x + 2y= 135....................(1)

x -5 = y

x-y = 5...............(2)

multiply in eq(2) ×2 and additng eq(1)

3x + 2y= 135..........
2x -2y = 10............
________________________

5x = 145
x = 29
put x's value is in equetion (2)

29 - y = 5

-y = 5-29

y = 24

[notebook cost = 29rs]
[textbook cost = 24rs] ans