A shopkeeper has 61 pens and 77 pencils. If he sells 5 pens and 7 pencils everyday, then after how many days will he have an equal number of pens and pencils?
Answers
Answered by
1
5,3
Let pencil be x and let pen be y
5x+7y=50
7x+5y=46
Multiply the first equation by 7
35x+49y=350
Multiply the second equation by 5
35x+25y=230
solving them we get 24y=120 which gives y is 5 rupees
substituting in the second equation we get x is 3 rupees
Answered by
1
Answer:
8 days
Step-by-step explanation:
Let the number of days require is x.
Then, 61 - 5x = 77 - 7x
=> 7x - 5x = 77 - 61
=> 2x = 16
=> x = 16/2
=> x = 8
Hence, 8 days require.
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