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)![]() ![]() You can put this solution on YOUR website! 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( "----- \n" ); document.write( "x = first digit \n" ); document.write( "y = second digit \n" ); document.write( "----- \n" ); document.write( "The sum of the digits of a two-digit number is 12. \n" ); document.write( "----- \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. \n" ); document.write( "----- \n" ); document.write( "The value of the number is two more than 11 times tens digit. \n" ); document.write( "----- \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) \n" ); document.write( "----- \n" ); document.write( "You have 2 equations that need to be solved simultaneously. \n" ); document.write( "They are: \n" ); document.write( "----- \n" ); document.write( "x + y = 12 \n" ); document.write( "and \n" ); document.write( "10*x + y = 11*x + 2 \n" ); document.write( "----- \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 \n" ); document.write( "----- \n" ); document.write( "You can substitute for y in your first equation to get: \n" ); document.write( "x + (x + 2) = 12 \n" ); document.write( "----- \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 \n" ); document.write( "----- \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 \n" ); document.write( "----- \n" ); document.write( "You have: \n" ); document.write( "x = 5 \n" ); document.write( "y = 7 \n" ); document.write( "----- \n" ); document.write( "Sum of the digits is 12 which is good. \n" ); document.write( "----- \n" ); document.write( "The number is xy = 57 \n" ); document.write( "----- \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. \n" ); document.write( "----- \n" ); document.write( "Your answer is: \n" ); document.write( "Number is 57 \n" ); document.write( "-----\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |