document.write( "Question 903539: fred is 3 years more than two and one-half times his sister's age. of fred is 18, how old is his sister? \n" ); document.write( "
Algebra.Com's Answer #548116 by Alan3354(69443)\"\" \"About 
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Subtract 3 from Fred's age, that's 2.5 times his sister's age.
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