document.write( "Question 1008034: Half the sum of the atomic number of two elements is 75. The first element is 8 less than twice the second element. What are the two elements and their atomic number?\r
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Algebra.Com's Answer #623814 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! Call their atomic numbers x and y. We have \n" ); document.write( "(1/2)(x + y) = 75 or x + y = 150 \n" ); document.write( "x = y - 8 or x - y = -8 \n" ); document.write( "Add these together and get \n" ); document.write( "2x = 142 \n" ); document.write( "x = 71 ==>Lutetium \n" ); document.write( "y = 79 ==>Gold \n" ); document.write( " |