document.write( "Question 402585: When a certain two digit number is divided by the number obtained by reversing the digits, the quotient is 2 and the remainder is 7. If the number is divided by the sum of its digits, the quotient is 7 and the remainder is 6. Find the number \n" ); document.write( "
Algebra.Com's Answer #284747 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! When a certain two digit number is divided by the number obtained by reversing \n" ); document.write( " the digits, the quotient is 2 and the remainder is 7. \n" ); document.write( " If the number is divided by the sum of its digits, the quotient is 7 and the remainder is 6. \n" ); document.write( "Find the number \n" ); document.write( ": \n" ); document.write( "The two digit number: x = the 10's digit; y = the units \n" ); document.write( ": \n" ); document.write( "\"When a certain two digit number is divided by the number obtained by reversing \n" ); document.write( " the digits, the quotient is 2 and the remainder is 7.\" \n" ); document.write( " \n" ); document.write( "10x + y - 7 = 2(10y + x) \n" ); document.write( "10x + y - 7 = 20y + 2x \n" ); document.write( "10x - 2x = 20y - y + 7 \n" ); document.write( "8x = 19y + 7 \n" ); document.write( ": \n" ); document.write( "\"If the number is divided by the sum of its digits, the quotient is 7 and the remainder is 6.\" \n" ); document.write( " \n" ); document.write( "10x + y - 6 = 7(x+y) \n" ); document.write( "10x + y - 6 = 7x + 7y \n" ); document.write( "10x - 7x = 7y - y + 6 \n" ); document.write( "3x = 6y + 6 \n" ); document.write( "divide by 3 \n" ); document.write( "x = (2y + 2) \n" ); document.write( ": \n" ); document.write( "Substitute (2y+2) for x in the 1st simplified equation \n" ); document.write( "8(2y + 2) = 19y + 7 \n" ); document.write( "16y + 16 = 19y + 7 \n" ); document.write( "16 - 7 = 19y - 16y \n" ); document.write( "9 = 3y \n" ); document.write( "y = 3 \n" ); document.write( ": \n" ); document.write( "Find x \n" ); document.write( "x = 2y + 2 \n" ); document.write( "x = 3(3) + 2 \n" ); document.write( "x = 8 \n" ); document.write( ": \n" ); document.write( "83 is the original number \n" ); document.write( "; \n" ); document.write( ": \n" ); document.write( "Check solution in the statement: \n" ); document.write( "When a certain two digit number is divided by the number obtained by reversing \n" ); document.write( " the digits, the quotient is 2 and the remainder is 7.\" \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( "do the same with the statement: \n" ); document.write( "\" If the number is divided by the sum of its digits, the quotient is 7 and the remainder is 6.\" \n" ); document.write( " |