document.write( "Question 975053: The unit digit of a two-digit number is 3 and seven times the sum of the digits is the number itself. Find the number.
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Algebra.Com's Answer #596863 by Edwin McCravy(20059) $\"\"$ $\"About$

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The unit digit of a two-digit number is 3

u = 3

and seven times the sum of the digits is the number itself.

7(t+u) = 10t+u\r\n" );
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document.write( "Substitute 3 for u:\r\n" );
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document.write( "7(t+3) = 10t+3\r\n" );
document.write( " 7t+21 = 10t+3\r\n" );
document.write( "   -3t = -18\r\n" );
document.write( "     t = 6

Find the number.

The tens digit is 6 and the units digit is 3, so the number is 63.\r\n" );
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document.write( "Edwin

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