document.write( "Question 554442: A boy is 17 years old and his sister is twice as old. When the boy is 23 years old, what will be the age of his sister? \n" ); document.write( "
Algebra.Com's Answer #361335 by Maths68(1474)\"\" \"About 
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Age of boy = 17
\n" ); document.write( "Age of sister = 17*2 = 34
\n" ); document.write( "Boy will be 23 old in = 23-17 = 6 years
\n" ); document.write( "Age of sister will be in six year = 34+6 = 40 years.
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