Answer :
Answer:
Rs. 66
Let the cost of one pen be x
Let the cost of one note book be y
Then refer to the phone attached
Step-by-step explanation:
let cost of 1 pen=x
cost of 1 notebook=y
acc. to 1 condition,,
2x+3y=66
acc. to 2 condition,,,
3x +2y=54
on adding both equations ,
2x+3y+3x+2y=66+54
5x+5y =120
5(x +y) =120
x+y= 24...............1
on subtracting both equations
( 2x+3y ) - (3x+2y)=66-54
-x+y=12
x -y= -12.............2
on eliminating 1 and 2
2x= 12
x= 6
from 1
x+y =24
6+y=24
y= 18
final answer,........
cost of 5 pens and 2 notebooks= 5x + 2y
=5.6 + 2.18 = 30+ 36 = 66