At a Mumbai stationery shop, 3 pens and 2 erasers cost Rs 70, while 1 pen and 1 eraser cost Rs 30.
Let the price of a pen be Rs $x$ and an eraser be Rs $y$ .
What is the price of one pen?

Question

At a Mumbai stationery shop, 3 pens and 2 erasers cost Rs 70, while 1 pen and 1 eraser cost Rs 30. Let the price of a pen be Rs x and an eraser be Rs y. What is the price of one pen?

Accepted Answer

10. 3x + 2y = 70 and x + y = 30 so y = 30 - x. Then 3x + 2(30 - x) = 70, 3x + 60 - 2x = 70, x = 10.

At a Mumbai stationery shop, 3 pens and 2 erasers cost Rs 70, while 1 pen and 1 eraser cost Rs 30.
Let the price of a pen be Rs $x$ and an eraser be Rs $y$ .
What is the price of one pen?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Word Problems practice

At a Mumbai stationery shop, 3 pens and 2 erasers cost Rs 70, while 1 pen and 1 eraser cost Rs 30.Let the price of a pen be Rs x and an eraser be Rs y.What is the price of one pen?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Word Problems practice

At a Mumbai stationery shop, 3 pens and 2 erasers cost Rs 70, while 1 pen and 1 eraser cost Rs 30.
Let the price of a pen be Rs $x$ and an eraser be Rs $y$ .
What is the price of one pen?