document.write( "Question 477249: Twice a number increased by 15 equals 31. What is the numbers?
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Algebra.Com's Answer #327155 by sonya(5)\"\" \"About 
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Let x be the number.
\n" ); document.write( "2x+15=31
\n" ); document.write( "2x=31-15
\n" ); document.write( "2x=16
\n" ); document.write( "x=16/2
\n" ); document.write( "x=8
\n" ); document.write( "The number is 8.
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