document.write( "Question 182255: the average of x,y, and z is 80. IF two of the numbers are 74 and 78, then what is the other number? \n" ); document.write( "
Algebra.Com's Answer #136781 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "If the average of three numbers is 80, then the sum of those three numbers divided by 3 is 80. Multiply 80 times 3, then subtract 74, then subtract 78, what you have left is the third number.\r
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