document.write( "Question 214932: I need your help with this digit problem: The sum of the digits of a two-digit number is 12. The value of the number is two more than 11 times tens digit. Find the number. \n" ); document.write( "
Algebra.Com's Answer #162392 by Theo(13342)\"\" \"About 
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I need your help with this digit problem: The sum of the digits of a two-digit number is 12. The value of the number is two more than 11 times tens digit. Find the number.
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\n" ); document.write( "x = first digit
\n" ); document.write( "y = second digit
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\n" ); document.write( "The sum of the digits of a two-digit number is 12.
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\n" ); document.write( "this means that x + y = 12
\n" ); document.write( "x is the tens digit.
\n" ); document.write( "y is the units digit.
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\n" ); document.write( "The value of the number is two more than 11 times tens digit.
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\n" ); document.write( "10 * x + y is the value of the number.
\n" ); document.write( "11 * x + 2 is two more than the value of the tens digit * 11.
\n" ); document.write( "Your equation here is:
\n" ); document.write( "10*x + y = 11*x + 2
\n" ); document.write( "This says that the value of your number (10*x + y) is 2 more than 11 times the tens digit (11*x + 2)
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\n" ); document.write( "You have 2 equations that need to be solved simultaneously.
\n" ); document.write( "They are:
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\n" ); document.write( "x + y = 12
\n" ); document.write( "and
\n" ); document.write( "10*x + y = 11*x + 2
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\n" ); document.write( "You can solve for y in your second equation of 10*x + y = 11*x + 2 to get:
\n" ); document.write( "y = x + 2
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\n" ); document.write( "You can substitute for y in your first equation to get:
\n" ); document.write( "x + (x + 2) = 12
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\n" ); document.write( "Remove parentheses to get:
\n" ); document.write( "2x + 2 = 12
\n" ); document.write( "Solve for x to get:
\n" ); document.write( "x = 5
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\n" ); document.write( "If x = 5, then x + y = 12 becomes:
\n" ); document.write( "5 + y = 12
\n" ); document.write( "Solve for y to get:
\n" ); document.write( "y = 7
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\n" ); document.write( "You have:
\n" ); document.write( "x = 5
\n" ); document.write( "y = 7
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\n" ); document.write( "Sum of the digits is 12 which is good.
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\n" ); document.write( "The number is xy = 57
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\n" ); document.write( "The value of the number is 2 more than 11 times the tens digit.
\n" ); document.write( "11 * the tens digit is 11 * 5 = 55
\n" ); document.write( "55 + 2 = 57
\n" ); document.write( "This is true confirming the values for x and y are good.
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\n" ); document.write( "Your answer is:
\n" ); document.write( "Number is 57
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