Question

cost of ball pen is 5 rupees less than1/3 of fountain pen

Answer 1

cost of ball pen =B
cost of fountain pen =F
b=(1/3f)-5

Answer 2

Hi Shraddha5thstd,
If you are asking for the equation of above statement then, here is your answer.

Let the cost of the Ball Pen and Fountain Pen be x and y respectively.
Now, according to the condition,
Cost of Ball Pen = ( 1 / 3 of the cost of Fountain Pen ) - 5
That is, x = (1 / 3 y) - 5
Hence, the required equation is x = ( 1 / 3 y ) - 5.
Note- At the place of x and y, you can take any variable of your choice!

hope this helps you.... : )
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