document.write( "Question 66773This question is from textbook Algebra 11
\n" ); document.write( ": Sarah's age exceeds Dana's age by 16 years. Four years ago, Sarah was twice as old as Dana was then. Find the present age of each. \n" ); document.write( "
Algebra.Com's Answer #47462 by venugopalramana(3286)\"\" \"About 
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Sarah's age (S) exceeds Dana's(D) age by 16 years.
\n" ); document.write( "S=D+16...................1
\n" ); document.write( "Four years ago,
\n" ); document.write( "SARA WAS S-4 YRS
\n" ); document.write( "DANA WAS D-4 YRS
\n" ); document.write( "Sarah was twice as old as Dana was then.
\n" ); document.write( "S-4=2(D-4)
\n" ); document.write( "S-4=2D-8............SUBSTITUTING FROM EQN.1
\n" ); document.write( "D+16-4=2D-8
\n" ); document.write( "2D-D=12+8=20
\n" ); document.write( "D=20
\n" ); document.write( "Find the present age of each.
\n" ); document.write( "DANA IS NOW 20 YRS
\n" ); document.write( "SARA IS NOW 20+16=36 YRS\r
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