document.write( "Question 724360: Need help with set up please!! I know the answer is 83 through playing with numbers, but I need to show it algebraically. thanks in advance\r
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document.write( "The tens digit of a two-digit number is 5 more than the units digit. If \"the number\" is divided by the sum of its digits, the partial quotient is 7 and the remainder is 6. Find \"the number.\" \n" );
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Algebra.Com's Answer #443713 by ankor@dixie-net.com(22740) You can put this solution on YOUR website! let a = the 10's digit \n" ); document.write( "let b = the units \n" ); document.write( "then \n" ); document.write( "10a+b = \"the number\" \n" ); document.write( ": \n" ); document.write( "Write an equation for each statement \n" ); document.write( ": \n" ); document.write( "\"The tens digit of a two-digit number is 5 more than the units digit.\" \n" ); document.write( "a = b + 5 \n" ); document.write( ": \n" ); document.write( "\"If \"the number\" is divided by the sum of its digits, the partial quotient is 7 and the remainder is 6.\" \n" ); document.write( "subtract the remainder (6) from the number to get an even 7 \n" ); document.write( " \n" ); document.write( "multiply both sides by (a+b) \n" ); document.write( "10a + b - 6 = 7(a+b) \n" ); document.write( "10a + b - 6 = 7a + 7b \n" ); document.write( "10a - 7a = 7b - b + 6 \n" ); document.write( "3a = 6b + 6 \n" ); document.write( "simplify, divide by 3 \n" ); document.write( "a = 2b + 2 \n" ); document.write( "Replace a with (b+5) \n" ); document.write( "b + 5 = 2b + 2 \n" ); document.write( "5 - 2 = 2b - b \n" ); document.write( "b = 3, \n" ); document.write( "then \n" ); document.write( "a = 3 + 5 \n" ); document.write( "a = 8 \n" ); document.write( ": \n" ); document.write( "83 is the number \n" ); document.write( ": \n" ); document.write( ":\r \n" ); document.write( "\n" ); document.write( "Check this, divide 83 by 11, 7 a remainder of 6\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |