Question

A sum of 500 RS is in the form of denominations of 5 RS and 10 RS. If the total number of
notes is 90 find the number of notes of each denomination.
(Hint: let the number of 5 rupee notes be 'x', then number of 10 rupee notes=90-x)​

Answer 1

Hey mate thank for the question

Hope it helps

Answer 2

Answer:

80- 5rupee, 10 -10rupee

Step-by-step explanation:

Let the number of 5 rupee notes as x

Let the number of 10 rupee note be y

so, x + y = 90.......Eq.1

and 5x + 10y = 500.........Eq.2

Multiply Eq.1 with 5

5x+5y=450....Eq.1¹

Subract Eq.1¹ from Eq.2

5x+10y=500

5x+5y=450 (-)

'''''''''''''''''''''''"

5y=50

y=10

Sub y=10 in Eq.1

x+10=90

x=80

Therefore The number of 5rs is 80 and 10rs is 10

Chk

5(x)+10(y)=500

5(80)+10(10)=500

400+100=500

500=500

LHS=RHS

Hence Proved

__________________________

Mrk as Brainlist :-)