Question

Kamala buys eight pens and 5 pencils for Rs. 55. Later she buys 2 pens and 3 pencils for Rs. 19. Find the cost of each pen and each pencil.​

Answer 1

Answer:

Explanation: The abscissa is the horizontal direction( x ) and the ordinate is the vertical direction( y ). The Quadrants are numbered in a counter-clockwise direction. As can be seen from the image the IV(4th) quadrant is positive in x direction and negative in the y direction.

Answer 2

Answer:

cost of pen=5 Rs

Cost of pencil=3Rs

Step-by-step explanation:

Let cost of pen be x and cost of pencil be y

8x+5y=55

(2x+3y=19)4

Multiplying eq 2 by 4

8x+5y=55

8x+12y=76

On solving

7y=21

y=3

x=5