document.write( "Question 552490: The average of numbers x, y and z is 7 and average of x and y is 5. Value of z is
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Algebra.Com's Answer #360319 by Alan3354(69443)\"\" \"About 
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(x+y+z)/3 = 7
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\n" ); document.write( "(x+y)/2 = 5
\n" ); document.write( "x+y = 10
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\n" ); document.write( "z = 11
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