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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.

0.10n + 0.05n + 6 = 2.10
0.10n + 0.05(n + 6) = 2.10
0.10(n + 6) + 0.05n = 2.10
0.10(n – 6) + 0.05n = 2.10

Question

Medal & Fan!(:





 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.


       0.10n + 0.05n + 6 = 2.10
        0.10n + 0.05(n + 6) = 2.10
        0.10(n + 6) + 0.05n = 2.10
        0.10(n – 6) + 0.05n = 2.10

anonymous · Answer

nickels = dimes + 6

n = d+6

d = n - 6

amilapsn · Answer

what's the value of a nickel/

anonymous · Answer

You have you have n-6 dimes, with that said, which one of your answers comes the closest to that...

kamibug · Answer

A nickel is 5 cents. (0.05) a dime is 10 cents (0.10). 
So those values will be their coefficients. 
(0.05)n + (0.10)d
And we can set it equal to $2.10 because that's what the total of coins is worth. 
(0.05)n + (0.10)d = 2.10
And we can change d to n - 6 because he has 6 more nickels than dimes.
(0.05)n + (0.10)(n - 6) = 2.10