document.write( "Question 539769: Mark is 23 years older than his sister Ann. In 9 years, he will be twice as old as Ann. How old is each of them now? \n" ); document.write( "
Algebra.Com's Answer #353538 by mananth(16946)\"\" \"About 
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Present age
\n" ); document.write( "Ann x
\n" ); document.write( "Mark' x + 23
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\n" ); document.write( "After 9 years
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\n" ); document.write( "Ann x + 9
\n" ); document.write( "Mark' ( x + 23 + 9 )
\n" ); document.write( " ( x + 32 )
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\n" ); document.write( " ( x + 32 ) = 2 ( x + 9 )
\n" ); document.write( " 1 x + 32 = 2 x + 18
\n" ); document.write( " x -2 x = 18 + -32
\n" ); document.write( " -1 x = -14
\n" ); document.write( "
\n" ); document.write( " x= 14
\n" ); document.write( "Ann age = 14 years
\n" ); document.write( "Mark' age = 37 years
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