document.write( "Question 1056536: My sister is 15 years older than I am. The sum of our ages is 31. Find our ages \n" ); document.write( "

Algebra.Com's Answer #671636 by Fombitz(32388) $\"\"$ $\"About$

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$\"S=M-15\"$
\n" ); document.write( " $\"S%2BM=31\"$
\n" ); document.write( "Substituting,
\n" ); document.write( " $\"M-15%2BM=31\"$
\n" ); document.write( " $\"2M=46\"$
\n" ); document.write( " $\"M=23\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"S=23-15\"$
\n" ); document.write( " $\"S=8\"$
\n" ); document.write( "I'm 23, she's 8.
\n" ); document.write( " \n" ); document.write( "

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