anonymous
  • anonymous
Your piggy bank has a total of 43 coins in it; some are dimes and some are nickels. If you have a total of $3.60, how many dimes do you have?
Mathematics
chestercat
  • chestercat
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Mathhelp346
  • Mathhelp346
so you know you have 43 coins. An equation for that would be n+d=43
lgbasallote
  • lgbasallote
you take this one @Mathhelp346 ^_^
Mathhelp346
  • Mathhelp346
nvm the second equation should be 10d+5n=160

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anonymous
  • anonymous
26 x 17 =3.60 im close... 3.45
Mathhelp346
  • Mathhelp346
then you would solve for either d or n in the first equation. i'm going to do n. you would subtract d from both sides, leaving you with n=43-d
Mathhelp346
  • Mathhelp346
you would sub n into the second equation and solve
Mathhelp346
  • Mathhelp346
do you know what to do from here?
anonymous
  • anonymous
29 dimes and 14 nickles.
Mathhelp346
  • Mathhelp346
i don't think that's right...
anonymous
  • anonymous
right?
Mathhelp346
  • Mathhelp346
that would add up to 360. you need 160
anonymous
  • anonymous
no the question is asking $3.60
Mathhelp346
  • Mathhelp346
oh my bad. your answer is right.

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