Question

I have 500 rupees. In That I buy the 12 assignment note and 3 record's..

NOW TELL what is the cost of one assignment note and what is the cost of 1 record..

Answer 1

Hi ,

Let cost of 1 assignment note = Rs x

Cost of 1 record = Rs y

According to the problem given ,

Total cost of 12 assignment note

and 3 records = Rs 500

12x + 3y = 500

It is a linear equation in two variables

x and y .

So., It has infinitely many solutions ,.

Example :

If x = 30

Then

12 × 30 + 3y = 500

360 + 3y = 500


3y = 500 - 360

3y = 140

y = 140 /3

Therefore ,

Cost of 1 assignment note =x = Rs 30

Cost of 1 record = y = Rs 140 / 3

I hope this helps you.

:)

Answer 2

✨Hey, here yours answer ✨

Let cost of 1 assignment note = Rs a

Cost of 1 record = Rs r

According to the problem given ,

Total cost of 12 assignment note

and 3 records = Rs 500

12a + 3r = 500

It is a linear equation in two variables

a and r .

So., It has infinitely many solutions ,.

Example :

If a = 30

Then

12 × 30 + 3r = 500

360 + 3r = 500


3r = 500 - 360

3r = 140

r = 140 /3

Therefore ,

Cost of 1 assignment note = a = Rs 30

Cost of 1 record = r = Rs 140 / 3

Hope it helps you...
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