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.\"
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Algebra.Com's Answer #443712 by KMST(5399)\"\" \"About 
You can put this solution on YOUR website!
\"a\" = tens digit
\n" ); document.write( "\"b\" = units digit
\n" ); document.write( "so the value of the number is \"10a%2Bb\" and
\n" ); document.write( "the sum of the digits is \"a%2Bb\"
\n" ); document.write( "The tens digit is 5 more than the units digit translates as
\n" ); document.write( "\"a=b%2B5\"
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\n" ); document.write( "Now comes the hard part:
\n" ); document.write( "If \"the number\" is divided by the sum of its digits, the partial quotient is 7 and the remainder is 6 translates as
\n" ); document.write( "\"10a%2Bb=7%28a%2Bb%29%2B6\" (dividend = divisor x quotient + remainder)
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\n" ); document.write( "Another way to see that:
\n" ); document.write( "The number divided by \"a%2Bb\" is 7 plus the fraction that we get when we divide the remainder by \"a%2Bb\"
\n" ); document.write( "\"%2810a%2Bb%29%2F%28a%2Bb%29=7%2B6%2F%28a%2Bb%29\"
\n" ); document.write( "Multiplying times \"a%2Bb\" both sides of the equal sign we get \"10a%2Bb=7%28a%2Bb%29%2B6\"
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\n" ); document.write( "Anyway,
\n" ); document.write( "\"10a%2Bb=7%28a%2Bb%29%2B6\" --> \"10a%2Bb=7a%2B7b%2B6\" --> \"3a%2Bb=7b%2B6\" --> \"3a=6b%2B6\" --> \"3a%2F3=%286b%2B6%29%2F3\" --> \"a=2b%2B2\"
\n" ); document.write( "Now we have a system of linear equations:
\n" ); document.write( "\"system%28a=b%2B5%2Ca=2b%2B2%29\" --> \"2b%2B2=b%2B5\" --> \"b%2B2=5\" --> \"b=5-2\" --> \"highlight%28b=3%29\"
\n" ); document.write( "\"system%28a=b%2B5%2Cb=3%29\" --> \"a=3%2B5\" --> \"highlight%28a=8%29\"
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