a purse has only 2 rupee and 5 rupee coin the sum of the coin is 36 and the total value of the coin is rupees 84 find the number of 5 rupee coins
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No. Of 2 rupee coins = 36-x
No. Of 5 rupee coins = x
2(36-x) + 5(x) = 84
72-2x + 5x = 84
3x = 84-72
3x = 12
x = 4
No. Of 5 rupee coins = 4
No. Of 5 rupee coins = x
2(36-x) + 5(x) = 84
72-2x + 5x = 84
3x = 84-72
3x = 12
x = 4
No. Of 5 rupee coins = 4
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