document.write( "Question 956436: a number is double and then increased by 9. the result is 57. find the original number \n" ); document.write( "
Algebra.Com's Answer #584333 by checkley77(12844)\"\" \"About 
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2X+9=57
\n" ); document.write( "2X=57-9
\n" ); document.write( "2X=48
\n" ); document.write( "X=48/2
\n" ); document.write( "X=24 ANS.
\n" ); document.write( "PROOF:
\n" ); document.write( "2*24+9=57
\n" ); document.write( "48+9=57
\n" ); document.write( "57=57
\n" ); document.write( "
\n" );