Question

5 pencils and 7 pens together cost 50 whereas 7 pencils are 5 pens together cost 46 . Find the cost of one pencil and that of one pen . From the pair of linear equations and find there solution graphically. ​

Answer 1

Answer:

Question:-

5 pencils and 7 pens together cost 50 whereas 7 pencils are 5 pens together cost 46 . Find the cost of one pencil and that of one pen . From the pair of linear equations and find there solution graphically.

Answer:-

Let pencil be x and let pen be 'y'

5x+7y=50

7x+5y=46

multiply first equation by 7

35x+49y = 350

multiply second equation by 5

35x+25y=230

solving them we get 24y=120 which gives y is 5 rupees

substituting in second equation we get x is 3 rupees

Step-by-step explanation:

$Hope \: it \: helps.$