document.write( "Question 849929: The arithmetic mean of two numbers is 20. Four less than one number is twice the other number. Find the two numbers
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Algebra.Com's Answer #511857 by Fombitz(32388)\"\" \"About 
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\"%28A%2BB%29%2F2=20\"
\n" ); document.write( "1.\"A%2BB=40\"
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\n" ); document.write( "2.\"A-4=2B\"
\n" ); document.write( "so
\n" ); document.write( "\"A=2B%2B4\"
\n" ); document.write( "Substituting into the first equation,
\n" ); document.write( "\"2B%2B4%2BB=40\"
\n" ); document.write( "\"3B=36\"
\n" ); document.write( "\"B=12\"
\n" ); document.write( "and then,
\n" ); document.write( "\"A%2B12=40\"
\n" ); document.write( "\"A=28\"
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