Question

Price of 5 pens and 3 pencils is 86 rupees and price of 2 pens and 7 pencils is

104 rupees . Then what is the price of a pen ? What is the price of a pencil ​

Answer 1

Step-by-step explanation:

Given total cost of 5 pens and 10 pencil = Rs 30

5 pens + 10 pencils = 30

pens + 2 pencils = 1

also given pen cost 3 more than a pencil

i.e, pen = 3 + pencil.

pen - pencil = 3

pens + 2 pencils = 6

_______________

-3 pencils = -3

pencils = 1

pen - 1 = 3

pen = 4

cost of pencils = 1 cost of pen = 4

Answer 2

Answer:

let the price of pencil be = (X)

and the price of pen be = (Y)

Step-by-step explanation:

so 5x +3y =85. (i)

then 2x +7y =104. (ii)

from the first equition

the value of (y) = ( 86-5x/3 ) (iii)

putting the value of (y) in 2nd equition, we get the value of (x) =10. ( iv)

then again put the value of ( x ) in 3rd equition

we get the value of (y) = 12

hence , the price of a pencil = 10

and ,the price of a pen = 12