Question

come on guys






purse has only two Rupee and five rupee coins the sum of the coins is 36 and the total value of the coins is 84 find the number of 5 rupee coins

Answer 1

• Let the no . of coin of 2 rupees. be x .
•      and  ''           ''         5   ''   ''        = y.

Then

x + y = 36.....(i)   .... multiply by 2. we get,

2 x + 2 y = 72...... (ii)

The value is 84.

Now

2 x + 5 y = 84 ....(iii)

Subtract (ii) from (iii)  we get,

3 y = 12

So

y = 4 and x = 32

No . of  5 rupees. coin = y = 4

Thank u.

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Answer 2

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let 2 rupee=x, let 5 rupee=y, so, x + y = 36,  x = 36-y therefore, 2x+5y=84,   2(36-y)+5y=84 =72-2y+5y=84,   -2y+5y=84-72 ,   3y=12 y=4.
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