anonymous
  • anonymous
okay if i have 30 nickels and dimes worth $2.40. how many nickles and dimes do i have ??
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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lgbasallote
  • lgbasallote
wait...do you mean 30 nickels and 30 dimes that equal to 2.40? Or 30 coins altogether?
anonymous
  • anonymous
together!!
anonymous
  • anonymous
???????

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lgbasallote
  • lgbasallote
your problem is a little difficult :( i'm sorry i wasn't able to answer it.
anonymous
  • anonymous
its okay
lgbasallote
  • lgbasallote
let x = no. of nickels y = no. of dimes x + y = 30 5(cents)x + 10(cents)y = 240 multiply the first equation by -5 -5x - 5y = -150 5x + 10y = 240 5y = 90 y = 19 There are 19 dimes and 11 nickels. I remembered how to do it :D It seems i made a mistake in my solution before that's why I can't solve it.

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