Question 330088
Let {{{H}}} be the number of half dollars, {{{N}}} the number of nickels.
1.{{{H+N=52}}}
2.{{{H=2N-2}}}
Substitute eq. 2 into eq. 1,
{{{2N-2+N=52}}}
{{{3N=54}}}
{{{N=18}}}
Then from eq. 2,
{{{H=36-2}}}
{{{H=34}}}
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34 half dollars and 18 nickels.