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if i have 16 coins they total $1.oo thaey are all dimes & nickels how many of each do i have
15 years ago

Answers

Reiny
nickels --- n
dimes ---- d

n+d = 12

5n + 10d = 100 or
n + 2d = 20

subtract the two equation, easy from there
15 years ago

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