vijay sells a pen at 25% loss and a pencil at 15% profit, he gets Rs.7 as profit.If he sells the pen at 25% profit and the pencil at 10% profit, he gets Rs 6 more. The price  of pen ?

Let's denote the cost price of the pen as 'P' and the cost price of the pencil as 'C'.

From the first condition, we know that Vijay sells the pen at a 25% loss and the pencil at a 15% profit, and he gets Rs.7 as profit. This can be written as:

-0.25P + 1.15C = 7 ---- (equation 1)

From the second condition, we know that if he sells the pen at a 25% profit and the pencil at a 10% profit, he gets Rs 6 more. This can be written as:

1.25P + 1.1C = 7 + 6 ---- (equation 2)

Solving these two equations will give us the cost price of the pen and the pencil.

Let's subtract equation 1 from equation 2:

1.25P + 1.1C - (-0.25P + 1.15C) = 13 - 7

This simplifies to:

1.5P - 0.05C = 6 ---- (equation 3)

Now, let's multiply equation 3 by 20 to make it easier to solve:

30P - C = 120 ---- (equation 4)

From equation 1, we can express C in terms of P:

C = (7 + 0.25P) / 1.15 ---- (equation 5)

Now, let's substitute equation 5 into equation 4:

30P - (7 + 0.25P) / 1.15 = 120

Solving this equation will give us the cost price of the pen 'P'.