document.write( "Question 555638: The sum of anne's amd fred's ages are 28. in 7 years anne will be twice as old as fred. How old are the now? \n" ); document.write( "
Algebra.Com's Answer #361875 by TutorDelphia(193)\"\" \"About 
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a+f=28
\n" ); document.write( "In 7 years a will be a+7 and f will be f+7
\n" ); document.write( "a+7=2(f+7)
\n" ); document.write( "a+7=2f+14
\n" ); document.write( "a=2f+7
\n" ); document.write( "sub in 2f+7 for a into my first equation and I get
\n" ); document.write( "2f+7+f=28
\n" ); document.write( "3f=21
\n" ); document.write( "f=7
\n" ); document.write( "Plug in 7 for f
\n" ); document.write( "a+7=28
\n" ); document.write( "a=21
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