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Which equation can be used to solve the following word problem?

Emilio has 6 more nickels than dimes, and the total value of his coins is $2.10. How many nickels does he have? Let n represent the number of nickels.

A:0.10(n-6)+0.05n=2.10
B:
0.10n+0.05(n+6)=2.10
C:0.10n+0.05n+6=2.10
D:
0.10(n+6)+0.05n=2.10

Respuesta :

Apocrophon
A is definitely the answer.
According to the statement, equation would be: 
0.10(n-6)+0.05n=2.10
0.10n - 0.60 + 0.05n = 2.10
0.15n = 2.70
n = 2.70/0.15
n = 18

So, in total he has 18 nickels

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