Question

5 pencils and 7 pens together cost 50 Rs whereas 7pencils and 5 pens together cost Rs 46 . Find the cost of one pencil and that of one pen​

Answer 1

Answer:

pencil = ₹3

pen = ₹5

Step-by-step explanation:

Hope it helps .

Answer 2

Answer:

pencil=3 Rs; pen=5 Rs

Step-by-step explanation:

let the cost of one pencil=x

let the cost of one pen=y

from the question,

5 pencils and 7 pens together costs 50,

So, 5x+7y=50 and similarly 7x+5y=46

from elimination method,

multiply the first equation by 7. And multiply the second eq with 5

We get

35x+49y=350

35x+25y=230

solving the above eq , we get y=120/24=5

substitute value of y=5 in any of the eq

then, we get x=3

therefore x=3 and y=5

hence, the cost of one pencil= 3

the cost of one pen= 5.