document.write( "Question 1085480: Karla's credit card bill is 420.90 part of the bill is previous month balance, part is new charges and part is from a late fee of 39.00. The previous balance is 172.40 less than the new charges. How much is the previous balance and how much is in new charges? \n" ); document.write( "

Algebra.Com's Answer #699601 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+a+\"$ = the previous balance
\n" ); document.write( "Let $\"+b+\"$ = the new charges
\n" ); document.write( "----------------------------------
\n" ); document.write( "(1) $\"+a+%2B+b+%2B+39+=+420.9+\"$
\n" ); document.write( "(2) $\"+a+=+b+-+172.4+\"$
\n" ); document.write( "-----------------------------
\n" ); document.write( "(1) $\"+a+%2B+b+=+381.9+\"$
\n" ); document.write( "(2) $\"+-a+%2B+b+=+172.4+\"$
\n" ); document.write( "-------------------------
\n" ); document.write( " $\"+2b+=+554.3+\"$
\n" ); document.write( " $\"+b+=+277.15+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+a+=+b+-+172.4+\"$
\n" ); document.write( "(2) $\"+a+=+277.15+-+172.4+\"$
\n" ); document.write( "(2) $\"+a+=+104.75+\"$
\n" ); document.write( "The previous balance is $104.75
\n" ); document.write( "The new charges are $277.15
\n" ); document.write( "---------------------------------
\n" ); document.write( "Check the answers
\n" ); document.write( "(1) $\"+a+%2B+b+%2B+39+=+420.9+\"$
\n" ); document.write( "(1) $\"+104.75+%2B+277.15+%2B+39+=+420.9+\"$
\n" ); document.write( "(1) $\"+381.9+%2B+39+=+420.9+\"$
\n" ); document.write( "(1) $\"+420.9+=+420.9+\"$
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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