document.write( "Question 350575: which numberrs are exactly 2 times the sum of their digits
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #250585 by ewatrrr(24785) You can put this solution on YOUR website! Hi, \n" ); document.write( "Note: Let td represent a 2 digit number. Then (10*t + d) is the value of the number. \n" ); document.write( ". \n" ); document.write( "Write as You Read \n" ); document.write( "(10*t + d) = 2(t + d) \n" ); document.write( ". \n" ); document.write( "simplifying \n" ); document.write( "10*t + d = 2t + 2d \n" ); document.write( "8*t = d \n" ); document.write( ". \n" ); document.write( "If t =1, then d=8 for example \n" ); document.write( ". \n" ); document.write( "18 is exactly 2 times the sum of its digits \n" ); document.write( "2(1 + 8)= 18 \n" ); document.write( " |