Connie cracks open a piggy bank and finds $3.70 (370 cents), all in nickels and dimes. There are 7 more dimes than nickels. How many nickels does Connie have?

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Answer 1 · 2016-05-11T18:18:27

Connie has #20# nickles.

If we mark the number of nickles by #n#, then the number of dimes can be witten as #n+7#. The total amount $3.70 leads to an equation:

#5n+10(n+7)=370#

#5n+10n+70=370#

#15n+70=370#

#15n=300#

#n=20#

The answer is : Connie has #20# nickles (and #27# dimes).