document.write( "Question 1009737: If there is 66 coins only nickels and dimes for a total of $4.40 how many of the coins are dimes how many are nickels? \n" ); document.write( "

Algebra.Com's Answer #625183 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+n+\"$ = numbe of nickels
\n" ); document.write( "Let $\"+d+\"$ = number of dimes
\n" ); document.write( "-------------------------
\n" ); document.write( "(1) $\"+n+%2B+d+=+66+\"$
\n" ); document.write( "(2) $\"+5n+%2B+10d+=+440+\"$ ( in cents )
\n" ); document.write( "------------------------------
\n" ); document.write( "This is 2 equations and 2 unknowns,
\n" ); document.write( "so it's solvable
\n" ); document.write( "(2) $\"+n+%2B+2d+=+88+\"$
\n" ); document.write( "Subtract (1) from (2)
\n" ); document.write( "(2) $\"+n+%2B+2d+=+88+\"$
\n" ); document.write( "(1) $\"+-n+-+d+=+-66+\"$
\n" ); document.write( "------------------
\n" ); document.write( " $\"+d+=+22+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+n+%2B+d+=+66+\"$
\n" ); document.write( "(1) $\"+n+%2B22+=+66+\"$
\n" ); document.write( "(1) $\"+n+=+44+\"$
\n" ); document.write( "There are 44 nickels and 22 dimes
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+5n+%2B+10d+=+440+\"$
\n" ); document.write( "(2) $\"+5%2A44+%2B+10%2A22+=+440+\"$
\n" ); document.write( "(2) $\"+220+%2B+220+=+440+\"$
\n" ); document.write( "(2) $\"+440+=+440+\"$
\n" ); document.write( "OK \n" ); document.write( "

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