In my collection of coin, i have 2 more 5 chetrum coin than 25 chetrum coin. How many 5 chetrum coins are there if the collection is worth Nu. 3.40?
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1 chetrum = 0.01 Nu
The value of 5 chetrum coin is :
0.01 × 5 = 0.05 Nu
The value of 25 chetrum coin is :
0.01 × 25 = 0.25 Nu
Let the number of 25 chetrum coin be x then the number of 5 chetrum coin is x + 2
0.05(x + 2) + 0.25x = 3.40
0.05x + 0.1 + 0.25x = 3.40
0.3x = 3.3
x = 3.3/0.3
x = 11
The number of 5 chetrum coins is :
11 + 2 = 13coins.
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