Question

plz solve this and if u dont know plz skip don't answer rubbish​

Answer 1

Answer:

The cost of each pen is Rs. 10 and the cost of each pencil is Rs. 36

Step-by-step explanation:

Let the cost of 1 pen be Rs. p and the cost of 1 pencil be Rs. c.

5c + 7p = 250   ...   (i)   x 5

7c + 5p = 302   ...   (ii)   x7

Multiply equation (i) by 5 and equation (ii) by 7.

25c + 35p = 1250   ...   (iii)

49c + 35p = 2114   ...   (iv)

(iii) - (iv)

25c - 49c + 35p - 35p = 1250 - 2114

- 24c = - 864

c = -864 ÷ -24

c = 36

Using c = 36 in (i)

(5 x 36) + 7p = 250

180 + 7p = 250

7p = 250 - 180

7p = 70

p = 70 ÷ 7

p = 10

So, the cost of each pen is Rs. 10 and the cost of each pencil is Rs. 36