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07-01-2015
Mathematics

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A collection of dimes and nickels is worth 950 there are 132 coins in all

How many of each coin are there

_dimes
_nickels

Respuesta :

07-01-2015

Do the same thing here.

d = dimes
n = nickels

d + n = 132
d = 132 - n

10d + 5n = 950
10(132 - n) + 5n = 950
1320 - 10n + 5n = 950
-5n = -370
n = 74

d = 132 - (74)
d = 58

58 dimes
74 nickels

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