Question

16. 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.
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Answer 1

Answer:

acc to ques

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

Step-by-step explanation:

Let the number of ₹ 5 notes = x

∴ The number of ₹10 notes = 90-x

Value of ₹ 5 notes= x \times×₹5 = ₹ 5x

an the value of ₹10 notes = (90-x)\times×₹10 = ₹(900-10x)

∴Total value of all the notes = ₹500

∴5x+(900−10x)=500

⇒5x+900−10x=500

⇒−5x=500−900

⇒−5x=−400

⇒x= −400/-5

⇒x=80

∴ The number of ₹ 5 notes = x = 80 and

The number of ₹ 10 notes = 90-x = 90-80 = 10 .