Question

the cost of book is rs 2 less than 3 times the cost of a pen , cost of a book = rs x ,cost of a pen =rs y

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Answer 1

Answer:

Step-by-step explanation:

Let the cost of a pen = Rs. x

Let the cost of a note book = Rs. y

From given data we have

x+y=60           ........ (1)

x=y−10           ........ (2)

Substituting x in (1) we get, y−10+y=60

⇒y+y=60+10⇒2y=70

∴y=  

2

70

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=35

Substituting y = 35 in (2) we get, x = 35 - 10 = 25

∴ The cost of a pen is Rs. 25.

The cost of a note book is Rs. 35.

Answer 2

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