document.write( "Question 460393: The average of 5 numbers is 48.The average of the first 3 numbers is 30. The forth number is 20 more then the fifth number. What is the fourth number. \n" ); document.write( "
Algebra.Com's Answer #315776 by ankor@dixie-net.com(22740)\"\" \"About 
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The average of 5 numbers is 48.The average of the first 3 numbers is 30.
\n" ); document.write( " The fourth number is 20 more then the fifth number.
\n" ); document.write( " What is the fourth number.
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\n" ); document.write( "\"The average of 5 numbers is 48\"
\n" ); document.write( "\"%28a%2Bb%2Bc%2Bd%2Be%29%2F5\" = 48
\n" ); document.write( "a + b + c + d + e = 5(48)
\n" ); document.write( "a + b + c + d + e = 240
\n" ); document.write( ":
\n" ); document.write( "\"The average of the first 3 numbers is 30.\"
\n" ); document.write( "\"%28a%2Bb%2Bc%29%2F3\" = 30
\n" ); document.write( "a + b + c = 90
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\n" ); document.write( "\"The fourth number is 20 more then the fifth number.\"
\n" ); document.write( "d = (e+20)
\n" ); document.write( "e = (d-20)
\n" ); document.write( ":
\n" ); document.write( "In the 1st equation replace a+b+c with 90, replace e with (d-20)
\n" ); document.write( "90 + d + (d-20) = 240
\n" ); document.write( "2d = 240 - 70
\n" ); document.write( "2d = 170
\n" ); document.write( "d = \"170%2F2\"
\n" ); document.write( "d = 85 is the 4th number
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