document.write( "Question 427278: The average age of 8 men is increased by 2 years when two of them whose ages are 21 years and 23 years are replaced by two new men. The average age of the two new men is- \n" ); document.write( "
Algebra.Com's Answer #297134 by robertb(5830)\"\" \"About 
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Let \"%28sum%28x%5Bi%5D%2C+i+=+1%2C+8%29%29%2F8+=+x\" be the average age of the original 8 men.
\n" ); document.write( "Let \"alpha\" = average age of the two new men.
\n" ); document.write( "<==> \"%28sum%28x%5Bi%5D%2C+i+=+1%2C+6%29+%2B+21%2B+23%29%2F8+=+x\"
\n" ); document.write( "<==> \"%28sum%28x%5Bi%5D%2C+i+=+1%2C+6%29+%2B2alpha+%2B+44+-+2alpha%29%2F8+=+x\"
\n" ); document.write( "<==> \"%28sum%28x%5Bi%5D%2C+i+=+1%2C+6%29+%2B2alpha%29%2F8+%2B+%2844+-+2alpha%29%2F8+=+x\"
\n" ); document.write( "<==> \"+x%2B2+%2B+%2844+-+2alpha%29%2F8+=+x\"
\n" ); document.write( "<==> \"2+%2B+%2844+-+2alpha%29%2F8+=+0\"
\n" ); document.write( "Solving for \"alpha\", we get \"alpha+=+30\", the average age of the two new men.
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