document.write( "Question 991627: In 21 years' time, Martin will be seven times as old as he was 3 years ago. \r
\n" ); document.write( "\n" ); document.write( "1. Write this information in the form of an equation involving Martin's present age, 'a' years.\r
\n" ); document.write( "\n" ); document.write( "2. Solve this equation to find Martin's present age.
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Algebra.Com's Answer #611492 by Timnewman(323)\"\" \"About 
You can put this solution on YOUR website!
Hi dear,
\n" ); document.write( "Let a be martin's age.
\n" ); document.write( "In 21yrs time,
\n" ); document.write( "Martin's age=(a+21)yrs
\n" ); document.write( "3yrs ago,he was (a-3)yrs
\n" ); document.write( "But he will be 7times as old as he was 3yrs ago,
\n" ); document.write( "Then
\n" ); document.write( "a+21=7(a-3)
\n" ); document.write( "This is the equation of his age now.
\n" ); document.write( "Solving the above equation,
\n" ); document.write( "a+21=7a-21
\n" ); document.write( "7a-a=21+21
\n" ); document.write( "6a=42
\n" ); document.write( "a=6yrs
\n" ); document.write( "His age now is 6yrs
\n" ); document.write( "HOPE THIS HELPS?
\n" ); document.write( "::TIMNEWMAN::
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