document.write( "Question 220122: My sister is half my age.
\n" ); document.write( "Next year she will be three times as old as I was thirteen years ago.
\n" ); document.write( "How old am I now?
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Algebra.Com's Answer #165327 by chibisan(131)\"\" \"About 
You can put this solution on YOUR website!
Your age = 2x , sister = x
\n" ); document.write( "1+x = 3(2x-13)
\n" ); document.write( "1+x = 6x - 39
\n" ); document.write( "40 = 5x
\n" ); document.write( "x = 8
\n" ); document.write( "2x = 16 (your age)
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