document.write( "Question 279142: The average of four numbers is 85. If three of the numbers are 79, 80 and 65, find the fourth number. \n" ); document.write( "

Algebra.Com's Answer #203005 by mananth(16946) $\"\"$ $\"About$

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The average of four numbers is 85. If three of the numbers are 79, 80 and 65, find the fourth number.\r
\n" ); document.write( "\n" ); document.write( "Let the number be x\r
\n" ); document.write( "\n" ); document.write( "x+224 / 4 =85\r
\n" ); document.write( "\n" ); document.write( "x+224= 340\r
\n" ); document.write( "\n" ); document.write( "x=340-224=116\r
\n" ); document.write( "\n" ); document.write( "the number =116\r
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