document.write( "Question 535162: Alex is three times as old as Aaron. If their age total 84 years, how old is Aaron? \n" ); document.write( "
Algebra.Com's Answer #351788 by Iluvidina(15)\"\" \"About 
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21
\n" ); document.write( "Their total age is 84
\n" ); document.write( "So you would add Alex and Aaron's ages to get the total of 84
\n" ); document.write( "You don't know either of their ages; you just know that Alex is 3 years older
\n" ); document.write( "So, you would use a variable to represent their ages
\n" ); document.write( "Aaron's age would be n and Alex's would be 3n because he is three years older
\n" ); document.write( "Your equation would be 84=3n+n
\n" ); document.write( "Then you would add 3n and n
\n" ); document.write( "84=4n
\n" ); document.write( "Then you would divide both sides by 4
\n" ); document.write( "So n=21
\n" ); document.write( "that is the last step because Aaron's age was represented by the variable
\n" ); document.write( "(if you were finding Alex's age, you would have to multiply 21 by 3, because Aaron's age is 21 and Alex is 3 years older)
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