document.write( "Question 1152109: Anna has 50 coins in her piggy bank. She notices that she only has dimes and pennies. If she has exactly four times as many pennies as dimes, how many pennies are in her piggy bank? \n" ); document.write( "

Algebra.Com's Answer #774041 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+p+\"$ = number of pennies
\n" ); document.write( "Let $\"+d+\"$ = number of dimes
\n" ); document.write( "--------------------------------------
\n" ); document.write( "(1) $\"+p+%2B+d+=+50+\"$
\n" ); document.write( "(2) $\"+p+=+4d+\"$
\n" ); document.write( "------------------------
\n" ); document.write( "Plug (2) into (1)
\n" ); document.write( "(1) $\"+4d+%2B+d+=+50+\"$
\n" ); document.write( "(1) $\"+5d+=+50+\"$
\n" ); document.write( "(1) $\"+d+=+10+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+p+=+4%2A10+\"$
\n" ); document.write( "(2) $\"+p+=+40+\"$
\n" ); document.write( "---------------------
\n" ); document.write( "She has 40 pennies
\n" ); document.write( " \n" ); document.write( "

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