document.write( "Question 153718: I have a word problem that I need some help with.\r
\n" ); document.write( "\n" ); document.write( " The sum of the digits of a three-digit number is 15. The tens place digit is twice the hundreds-place digit, and the ones place digit is 1 less than the hundreds-place digit. Find the three digit number.\r
\n" ); document.write( "\n" ); document.write( "I thought
\n" ); document.write( "15=2x+x+x-1
\n" ); document.write( "Im pretty sure this isn't right. could you please help me with this word problem. when do I know to use x or y? please help me work through the equation also.
\n" ); document.write( "thank you \n" ); document.write( "

Algebra.Com's Answer #113146 by nerdybill(7384) $\"\"$ $\"About$

You can put this solution on YOUR website!
The sum of the digits of a three-digit number is 15. The tens place digit is twice the hundreds-place digit, and the ones place digit is 1 less than the hundreds-place digit. Find the three digit number.
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\n" ); document.write( "Let x = hundreds-place digit
\n" ); document.write( "then
\n" ); document.write( "2x = tens-place digit
\n" ); document.write( "x-1 = ones-place digit
\n" ); document.write( ".
\n" ); document.write( "x + 2x + (x-1) = 15
\n" ); document.write( "4x - 1 = 15
\n" ); document.write( "4x = 16
\n" ); document.write( "x = 4 (hundreds-place digit)
\n" ); document.write( "2x = 8 (tens-place digit)
\n" ); document.write( "x-1 = 3 (ones-place digit)
\n" ); document.write( ".
\n" ); document.write( "Therefore you 3 digit number is:
\n" ); document.write( "483 \n" ); document.write( "

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