Question

A sum of ₹ 500 is in the form of denominations of ₹5 and ₹10. If the total number of notes is 90.
find the number of notes of each type.
160​

Answer 1

Answer:

5x+10(90-x)=500

5x+900-10x=500

10x-5x=900-500

5x=400

x=400/5=80

and (90-x)=(90-80)=10

Step-by-step explanation:

Answer 2

Answer:

500= 5x + 10y

x+y = 90

Step-by-step explanation:

x=90-y

500= 450-5y + 10 y

500 = 450 + 5y

5y= 50

y=10

x = 90-y

x=90-10

x= 80

thanks