document.write( "Question 909253: Katerina Labov inherited some money and invested it at 6% simple interest. At the end of the year, the total amount of her original principal and the interest was $12,720. How much did she originally invest? \n" ); document.write( "

Algebra.Com's Answer #551757 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+P+\"$ = the original principal
\n" ); document.write( " $\"+P+%2B+.06%2AP+=+12720+\"$
\n" ); document.write( " $\"+1.06P+=+12720+\"$
\n" ); document.write( " $\"+P+=+12720+%2F+1.06+\"$
\n" ); document.write( " $\"+P+=+12000+\"$
\n" ); document.write( "She invested $12,000
\n" ); document.write( "check:
\n" ); document.write( "The interest must have been
\n" ); document.write( " $\"+12720+-+12000+=+720+\"$
\n" ); document.write( " $\"+.06%2A12000+=+720+\"$
\n" ); document.write( "OK \n" ); document.write( "

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