document.write( "Question 773541: I am 16 years old. i'm also 4 times older than my sister. after many years i'm will be 2 times older than my sister. how old i am? \n" ); document.write( "
Algebra.Com's Answer #471635 by Alan3354(69443)\"\" \"About 
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I am 16 years old. i'm also 4 times older than my sister. after many years i'm will be 2 times older than my sister. how old i am?
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\n" ); document.write( "4 times older = 5 times as old.
\n" ); document.write( "--> she's 3.2 years old.
\n" ); document.write( "The difference is 12.8 years, and will remain constant.
\n" ); document.write( "--> 2 times older = 3 times as old
\n" ); document.write( "your age + 12.8 = 3*your age
\n" ); document.write( "After 6.4 years.
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\n" ); document.write( "If 4 times older = 4 times as old, then how much is 1 times older, or a 100% increase?
\n" ); document.write( "They are not the same.
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