document.write( "Question 929771: A three digit number with respective digits from left to right of SSS is added to a three digit number with respective digits from left to right of TTT, and the sum is a four digit number with respective digits from left to right of TTTR. Find the value of the digit S.\r
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Algebra.Com's Answer #564500 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( " SSS\r\n" );
document.write( "+TTT\r\n" );
document.write( "TTTR\r\n" );
document.write( "\r\n" );
document.write( "There must be a 1 carried to the left-most column,\r\n" );
document.write( "so we put a 1 above it:\r\n" );
document.write( "\r\n" );
document.write( "1\r\n" );
document.write( " SSS\r\n" );
document.write( "+TTT\r\n" );
document.write( "TTTR\r\n" );
document.write( "\r\n" );
document.write( "Therefore T can only be 1, so all the T's are 1's:\r\n" );
document.write( "\r\n" );
document.write( "1\r\n" );
document.write( " SSS\r\n" );
document.write( "+111\r\n" );
document.write( "111R\r\n" );
document.write( "\r\n" );
document.write( "If there weren't any other 1's to carry, the S's would have \r\n" );
document.write( "to be 0's. But the S's can't be 0, for SSS cant be 000, so \r\n" );
document.write( "there must also be 1's carried to the next two columns of \r\n" );
document.write( "digits too, so we put 1's above them too:\r\n" );
document.write( "\r\n" );
document.write( "111\r\n" );
document.write( " SSS\r\n" );
document.write( "+111\r\n" );
document.write( "111R\r\n" );
document.write( "\r\n" );
document.write( "So the only thing S can be is 9 so that when we add it to 1 \r\n" );
document.write( "plus the 1 to carry we'll get 11.  So the S's are all 9's:\r\n" );
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document.write( "111\r\n" );
document.write( " 999\r\n" );
document.write( "+111\r\n" );
document.write( "111R\r\n" );
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document.write( "And finally we see that the R must be 0:\r\n" );
document.write( "\r\n" );
document.write( "111\r\n" );
document.write( " 999\r\n" );
document.write( "+111\r\n" );
document.write( "1110\r\n" );
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document.write( "Edwin
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