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
\n" ); document.write( "\n" ); 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" ); document.write( "

Algebra.Com's Answer #443713 by ankor@dixie-net.com(22740)\"\" \"About 
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( "\"%28%2810a%2Bb-6%29%29%2F%28%28a%2Bb%29%29\" = 7
\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( "
\n" );