document.write( "Question 1157965: robert is 15 years old than his sister helen. the sum of their ages is 63. find their ages. \n" ); document.write( "
Algebra.Com's Answer #780897 by Alan3354(69443)\"\" \"About 
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robert is 15 years old than his sister helen. the sum of their ages is 63. find their ages.
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\n" ); document.write( "\"robert is 15 years old ...\"
\n" ); document.write( "He's 15.
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\n" ); document.write( "63-15 = 48
\n" ); document.write( "She's 48
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