document.write( "Question 1118411: 5. A boy is 5 years old and his sister is three times as old as he is. When the boy is 15 years old, how old will his sister be?
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Algebra.Com's Answer #733712 by t0hierry(194)\"\" \"About 
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Short answer
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\n" ); document.write( "s = 15
\n" ); document.write( "b = 5+10
\n" ); document.write( "s = 15 + 10 = 25
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