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2 years ago

I have a mix of 12 nickels and dimes in my pocket. All together I have $1 . How many nickles and dimes do I have?

Mathematics

1 answer:

fenix001 [56]2 years ago

8 0

Answer:

Step-by-step explanation:

n + d = 12

0.05n + 0.1d = 1 ║ × ( - 10 )

n + d = 12 ..... (1)

- 0.5n - d = - 10 ..... (2)

(1) + (2)

0.5n = 2 ⇒ n = 4

d = 12 - 4 = 8

There are 4 nickels and 8 dimes in the pocket.

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