document.write( "Question 580683: Mary is sixteen years old and is 4 times as old as her brother. How old will Mary be when she is twice as old as her brother? \n" ); document.write( "
Algebra.Com's Answer #371335 by Alan3354(69443)\"\" \"About 
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Mary is sixteen years old and is 4 times as old as her brother. How old will Mary be when she is twice as old as her brother?
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\n" ); document.write( "She's 16, he's 4.
\n" ); document.write( "The difference is 12.
\n" ); document.write( "She'll be 2x when he's 12
\n" ); document.write( "She'll be 24.\r
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