document.write( "Question 893113: Maryum is twice as old as her youngest sister. The difference between their ages is 13 years. How old is her youngest sister? \n" ); document.write( "
Algebra.Com's Answer #541062 by algebrahouse.com(1659)\"\" \"About 
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If she is twice as old, and the difference is 13,
\n" ); document.write( "then one is 13 and the other is 26.\r
\n" ); document.write( "\n" ); document.write( "Just multiplied 13 by 2.
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